Spassov, N., 2016. Southeastern Europe as a route for the earliest dispersal of Homo toward Europe: Ecological Conditions and the Timing of the First Human Occupation of Europe. In: Harvati, K., Roksandic, M. (eds), Paleoanthropology of the Balkans and Anatolia. Springer, Dordrecht, 281—290. — 10.1007/978-94-024-0874-4_16
Spassov, N., 2016. On the origin of Wisent, again. — Historia naturalis bulgarica, 23: 207—210.
Ivanova, S., Gurova, M., Spassov, N., Hristova, L., Tzankov, N., Popov, V., Marinova, E., Makedonska, J., Smith, V., Ottoni, C., Lewis, M., 2016. Magura Cave, Bulgaria: a multidisciplinary study of Late Pleistocene human palaeoenvironment in the Balkans. — Quaternary international, 86—108. doi:10.1016/j.quaint.2015.11.082 [PDF]
Hristov, P., Sirakova, D., Mitkov, I., Spassov, N., Radoslavov, G., 2016. Balkan Brachicerous Cattle — the first domesticated cattle in Europe. — Mitochondrial DNA, Part A. doi:10.1080/24701394.2016.1238901
Gurova, M., Ivanova, S., Spassov, N., Hristova, L., Krumov, I., Verheyden, S., Marinova, E., Dedov, I., 2016. Excavations at Mishin Kamik Cave: 2015 season. — Archaeological Discoveries and Excavations in 2015, National Archaeological Institute with Museum at the Bulgarian Academy of Sciences, 56—58.
Geraads, D., Spassov, N., 2016. Musteloid carnivores from the upper Miocene of South-Western Bulgaria, and the phylogeny of the Mephitidae. — Geodiversitas, 38 (4): 543—558. doi:10.5252/g2016n4a5
David, D., Orr, C. M., Hodgkins, J., Spassov, N., Gurova, M., Miller, C., Tzankov, Ts., 2016. The Human Fossil Record of Bulgaria and the Formulation of Biogeographic Hypotheses. — In: Harvati, K., Roksandic, M. (eds), Paleoanthropology of the Balkans and Anatolia. Springer, Dordrecht, 187—211.
de Jong, Y., Kouwenberg, J., Boumans, L., Hussey, C., Hyam, R., Nicolson, N., Kirk, P., Paton, A., Michel, E., Guiry, M., Boegh, P., Pedersen, H., Enghoff, H., von Raab-Straube, E., Güntsch, A., Geoffroy, M., Müller, A., Kohlbecker, A., Berendsohn, W., Appeltans, W., Arvanitidis, C., Vanhoorne, B., Declerck, J., Vandepitte, L., Hernandez, F., Nash, R., Costello, M., Ouvrard, D., Bezard-Falgas, P., Bourgoin, T., Wetzel, F., Glöckler, F., Korb, G., Ring, C., Hagedorn, G., Häuser, C., Aktaç, N., Asan, A., Ardelean, A., Borges, P., Dhora, D., Khachatryan, H., Malicky, M., Ibrahimov, S., Tuzikov, A., De Wever, A., Moncheva, S., Spassov, N., Chobot, K., Popov, A., Boršić, I., Sfenthourakis, S., Kõljalg, U., Uotila, P., Olivier, G., Dauvin, J., Tarkhnishvili, D., Chaladze, G., Tuerkay, M., Legakis, A., Peregovits, L., Gudmundsson, G., Ólafsson, E., Lysaght, L., Galil, B., Raimondo, F., Domina, G., Stoch, F., Minelli, A., Spungis, V., Budrys, E., Olenin, S., Turpel, A., Walisch, T., Krpach, V., Gambin, M., Ungureanu, L., Karaman, G., Kleukers, R., Stur, E., Aagaard, K., Valland, N., Moen, T., Bogdanowicz, W., Tykarski, P., Węsławski, J., Kędra, M., M. de Frias Martins, A., Abreu, A., Silva, R., Medvedev, S., Ryss, A., Šimić, S., Marhold, K., Stloukal, E., Tome, D., Ramos, M., Valdés, B., Pina, F., Kullander, S., Telenius, A., Gonseth, Y., Tschudin, P., Sergeyeva, O., Vladymyrov, V., Rizun, V., Raper, C., Lear, D., Stoev, P., Penev, L., Rubio, A., Backeljau, T., Saarenmaa, H., Ulenberg, S., 2015. PESI — a taxonomic backbone for Europe. — Biodiversity Data Journal, 3: e5848. doi:10.3897/BDJ.3.e5848
Spassov, N., Tosheva, S., 2015. 125 years National Museum of Natural History, BAS. — Historia naturalis bulgarica, 21: 3—8. [PDF]
Spassov, N., Spiridonov, G., Ivanov, V., Assenov, L., 2015. Signs of the bear life activities and their utilization for the monitoring of the bear (Ursus arctos L.) in Bulgaria. — Historia naturalis bulgarica, 22: 73—83. [PDF] doi:10.5281/zenodo.4043873
Spassov, N., Peykov, V., Simeonov, P., 2015. Evidences for the Lynx recovery in Bulgaria: the Lynx discovered in Western Rhodopes. — ZooNotes, 73: 1—4.
Spassov, N., Iliev, N., Karastoyanova, N., Chohadziev, S., 2015. The Remains of Wild and Domestic Animals from the Late Chalcolithic Tell Settlement of Hotnitsa (Northern Bulgaria). — Archaeologia Bulgarica, IXI, 2, 1—21.
Spassov, N., Ignatov, A., Acosta-Pankov, I., 2015. The Story of the Turkish Dhole. Exploring and documenting diversity in nature. — CETAF Newsletter, October 2015.
Spassov, N., Geraads, D., 2015. A New Felid from the Late Miocene of the Balkans and the Contents of the Genus Metailurus Zdansky, 1924 (Carnivora, Felidae). — Journal of Mammal Evolution, 22: 45—56. doi:10.1007/s10914-014-9266-5 [PDF]
Shaller, M., Lachner, J., Christl, M., Maden, C., Spassov, N., Ilg, A., Böhme, M., 2015. Authigenic Be as a tool to date river terrace sediments? — An example from a Late Miocene hominid locality in Bulgaria. — Quaternary Geochronology, 29: 6—15.
Ivanov, V., Spassov, N., 2015. Some new data on the distribution, habitats and ecology of the threatened European mustelids Mustela eversmanii and Vormela peregusna in Bulgaria. — Historia naturalis bulgarica, 21: 267—271. [PDF] doi:10.5281/zenodo.4043845
Hristov, P., Spassov, N., Iliev, N., Radoslavov, G., 2015. An Independent Event of Neolithic Cattle Domestication on the South-Eastern Balkans. Evidence from Prehistoric Aurochs and Cattle Populations. — Mitochondrial DNA, Taylor & Francis Group. doi:10.3109/19401736.2015.1127361 [PDF]
Gurova, M., Ivanova, S., Krumov I., Spassov, N., Hristova, L., 2015. Research of Mishin Kamik Cave — second season. — Archaeological Discoveries and Excavations in 2014, National Archaeological Institute with Museum at the Bulgarian Academy of Sciences, 32—33.
Banea, O. C., Bogdanowicz, W., Lapini, L., Giannatos, G., Spassov, N., 2015. Letter of complaint about the situation of the golden jackal in Lithuania. — GOJAGE e-bulletin form 2nd of June 2015.
Спасов, Н., Тошева, С., 2015. Националният природонаучен музей при БАН отбеляза 125 години. — сп. Гора, 1: 10—11. [PDF]
Spassov, N., Stoyanov, S., 2014. On the specific taxonomical status of the wolf-jackal Canis lupaster. — First International Jackal Symposium. Book of abstracts. 13—16 October. Veliko Gradiste, Serbia. Univ. of Belgrade, p. 20.
Spassov, N., Iliev, N., 2014. Bone remains from domestic and wild Animals. — In: Yabalkovo, Vol. 1., Chapter XII. Edited by: J. Roodenberg, K. Leshtakov, V. Petrova. ATE — Ars et Technica Explicatus, Sofia University ‘ST. Kliment Ohridski’. Sofia, 2014, 425—432. [PDF]
Ivanova, S., Krumov, I., Spassov, N., Hristova, L., Makedonska, J., Gurova, M., Strait, D., 2014. Excavations at Mishin kamik cave, Chiprovtsi area. — Archaeological Discoveries and Excavations in 2013, National Archaeological Institute with Museum at the Bulgarian Academy of Sciences, 31—33.
Gurov, T., Atanassov, E., Karaivanova, A., Serbezov, R., Spassov, N., 2014. Statistical Estimation of Brown Bears population in Rhodope Mountains. — Proceedings of the International Conference: Numerical Methods for Scientific Computations and Advanced Applications (NMSCAA’14). May 19—22, 2014, Bansko, Bulgaria. Georgiev K (editor). IICT & SIAM, Sofia, pp. 43—46.
Acosta-Pankov, I., Spassov, N., 2014. Preliminary results on social behavior of golden jackals (Canis aureus Linnaeus, 1758) living in captivity at the Zoo in Sofia, Bulgaria. — First International Jackal Symposium. Book of Abstracts.
Acosta-Pankov, I., Banea, O. C., Spassov, N., 2014. Preliminary results of the population density of Golden jackals (Canis aureus Linnaeus, 1758) in various habitats in Eastern Bulgaria. — First International Jackal Symposium. Book of abstracts. 13—16 October. Veliko Gradiste, Serbia. Univ. of Belgrade, p. 12.
Спасов, Н., Тошева, С., 2014. Националният природонаучен музей при БАН на 125 години. — сп. Наука, 5: 8—9. [PDF]
Недялков, Н., Спасов, Н., 2014. От кафявозъбката до кафята мечка (бозайници). — В: Природното богатство на Природен парк Витоша, 107—122.
Šálek, M., Spassov, N., Andera, M., Enzinger, K., Ottlecz, B., Hegyeli, Zs., 2013. Population status, habitat associations, and distribution of the steppe polecat Mustela eversmanii in Europe. — Acta Theriologica, 58 (3): 233—244. [PDF]
Tzankov, Tz., Spassov, N., Stoyanov, K., Geraads, D., 2013. Late Miocene model of the area between Vardar and Middle Struma Rivers. Neogene to Quaternary Geological Evolution of Mediterranean, Paratethys and Black Sea. — RCMNS 14th Congress, 8—12 September 2013 Istambul. Book of Abstracts, p. 184.
Ivanova, S., Gurova, M., Spassov, N., Hristova, L., Gyaurova, B., Makedonska, J., Atanasova, E., Marinova, E., Hodgkins, D., Miller, C., Strait, D., 2013. Archaeological excavations at Magura cave. — Archaeological Discoveries and Excavations in 2012. National Archaeological Institute with Museum at the Bulgarian Academy of Sciences, 34—37.
Hristova, L., Geraads, D., Markov, G., Spassov, N., 2013. Late Miocene mammals from Kocherinovo, Southwestern Bulgaria. — Acta zoologica bulgarica, 65 (4): 521—534. [PDF]
Geraads, D., Spassov, N., Kovachev, D., 2013. Palaeoreas lindermayeri (Wagner, 1848) from the upper Miocene of Bulgaria, and a revision of the species. — Geodiversitas, Paris, 25 (2): 405—415.
Böhme, M., Aiglstorfer, M., Boev, Z., Bullmann, L., Dolezych, M., Havlik, P., Hristova, L., Ilg, A., Markov, G., Ognjanova, N., Prieto, J., Uhl, D., Vasilyan, D., Spassov, N., 2013. Staniantsi — an exceptional vertebrate locality from the Miocene-Pliocene transition of Western Bulgaria. Neogene to Quaternary Geological Evolution of Mediterranean, Paratethys and Black Sea. — RCMNS 14th Congress, 8—12 September 2013 Istambul. Book of Abstracts, p. 135.
Böhme, M., Aiglstorfer, M., Boev, Z., Bullmann, L., Dolezych, M., Havlik, P., Hristova, L., Ilg, A., Markov, G., Ognjanova, N., Prieto, J., Uhl, D., Vasilyan, D., Spassov, N., 2013. Staniantsi — an exceptional vertebrate locality from the Miocene-Pliocene transition of Western Bulgaria. — Abstracts, 5th International Workshop on the Neogene from the Central and South-Eastern Europe Varna, 16th — 20th May 2013, Varna.
Spassov, N., Geraads, D., Hristova, L., Markov, G. N., Merceron, G., Tzankov, Tz., Stoyanov, K., Böhme, M., Dimitrova, A., 2012. A hominid tooth from Bulgaria: the last pre-human hominid of continental Europe. — Journal of Human Evolution, 62 (1): 138—145.
Milchev, B., Spassov, N., Popov, V., 2012. Diet of the Egyptian vulture (Neophron percnopterus) after livestock reduction in Eastern Bulgaria. — North-Western Journal of Zoology, 8 (2): 315—323.
Janosch, A., Humer, A., Heltai, M., Murariu, D., Spassov, N., Hackländer, K., 2012. Current status and distribution of golden jackals (Canis aureus L., 1758) in Europe. — Mammal Review, Volume 42, No. 1, 1—11.
Ivanova, S., Gurova, M., Spassov, N., popov, V., Makedonska, J., Tzankov, Ts., Strait, D., 2012. Preliminary findings of the Balkan Paleo project: evidence of human activity at the ‘gateway’ of Europe during the Late Pleistocene. — Bе-Ja (Bulgarian electronic journal of Archaeology), 2: 1—23. [PDF]
Clavel, J., Merceron, G., Hristova, L., Spassov, N., Kovachev, D., Escarguel, G., 2012. On Mesopithecus habitat: insights from late Miocene fossil vertebrate localities of Bulgaria. — Journal of Human Evolution, 63 (1): 162—179. [PDF]
Спасов, Н., Боев, З., 2012. Д-р Николай Илиев на 80 години. — Historia naturalis bulgarica, 20: 40. [PDF]
Spassov, N., Geraads, D., 2011. A skull of Simocyon primigenius (Roth & Wagner, 1854) (Carnivora, Ailuridae) from the late Miocene of Karaslari (Republic of Macedonia), with remarks on the systematics and evolution of the genus. — Neues Jahrbuch für Geologie und Paläontologie Abh., 262 (2): 151—161. [PDF]
Spassov, N., 2011. Acinonyx pardinensis (Croizet et Jobert) remains from the Middle Villafranchian locality of Varshets, Bulgaria and the Plio-Pleistocene history of the cheetahs in Eurasia. — In: (Morales J., ed.) Memorial Volume to honour Léonard Ginsburg’s contribution to palaeontology. Estudios Geológicos, 67 (2) julio—diciembre 2011, 245—253. [PDF]
Ralf-Dietrich, K., García, N., Kostopoulos, D. S., Lacombat, F., Lister, A. M., Mazza, P. P., Spassov, N., Titov, V. V., 2011. Western Palaearctic palaeoenvironmental conditions during the Early and early Middle Pleistocene inferred from large mammal communities, and implications for hominin dispersal in Europe. — In: José Carrión, Jim Rose and Chris Stringer (Editors) — Ecological scenarios for human evolution during the Early and early Middle Pleistocene in the western Palaearctic.Quaternary Science Reviews, 30 (2011) 1368—1395. [PDF]
Geraads, D., Spassov, N., Hristova, L., Markov, G. N., Tzankov, T., 2011. Upper Miocene mammals from Strumyani, South-Western Bulgaria. — Geodiversitas, 33 (3): 451—484. [PDF]
Geraads, D., Spassov, N., Hristova, L., Markov, G. N., Garevski, R., 2011. Large mammal faunas from the late Neogene of the F. Y. Republic of Macedonia. — 9th Annual Meeting of the European Association of Vertebrate palaeontologists, Heraklion, Crete, 14—19 June.
Cachorro, A. M., Ivanova, S., Gurova, M., Perez-Gonzalez, A., Rodriguez Mendez, J., Spassov, N., Tarrico Vinagre, A., Tzankov, Tz., 2011. Eastern Rhodopes (Sur de Bulgaria): en la Ruta de las Migraciones Humanas en el Pleistoceno de Eurasia. Excavaciones en el exterior 2009. — Ministerio de cultura, España. Informes y trabajos, 5: 16—25.
Спиридонов, Ж.,Спасов, Н., 2011. Рис Lynx lynx (L.). — В: Големански, В. (гл. ред.). 2011. Червена книга на Република България. Том. 2. Животни. ИБЕИ-БАН & МОСВ, София.
Спиридонов, Ж.,Спасов, Н., 2011. Мечка Ursus arctos L. — В: Големански, В. (гл. ред.). 2011. Червена книга на Република България. Том. 2. Животни. ИБЕИ-БАН & МОСВ, София.
Спиридонов, Ж.,Спасов, Н., 2011. Вълк Canis lupus L. — В: Големански, В. (гл. ред.). 2011. Червена книга на Република България. Том. 2. Животни. ИБЕИ-БАН & МОСВ, София.