Bekchiev, R., Antov, M., Boyadzhiev, P., Zaemdzhikova, G., Kostova, R., Guéorguiev, B., 2022. Carabus variolosus (Fabricius, 1787) (Coleoptera: Carabidae) in Bulgaria: rediscovered after 111 years. — Historia naturalis bulgarica, 44 (10): 119—123. [PDF] doi:10.48027/hnb.44.103
Bekchiev, R., Crevecoeur, L., Gielen, K., Bosmans, B., Smets, K., Kostova, R., 2020. One Hundred Years of Solitude: Rediscovery of the Rare and Protected Beetle Rhysodes sulcatus (Fabricius, 1787) (Coleoptera: Rhysodidae) in Bulgaria. — Acta zoologica bulgarica, (in print) published online at http://www.acta-zoologica-bulgarica.eu/002372.
Асенова, А., Лангуров, М., Симов, Н., Бекчиев, Р., 2020. Бъдете равни с природата. Учебно помагало за деца от предучилищна възраст. — Община Кюстендил, Национален природонаучен музей—БАН, София, 56 с. [PDF]
Асенова, А., Лангуров, М., Симов, Н., Бекчиев, Р., 2020. Будите једнаки са природом. Кратка образовна књижица за децу предшколског узраста. — Општина Ћустендил, Национални природњачки музеј—БАН, Софија, 55 с. [PDF]
Ćurčić, S., Pavićević, D., Radović, D., Vesović, N., Bekchiev, R., Ćurčić, N., Guéorguiev, B., 2019. Current and predicted distribution of the rare and threatened beetle Bolbelasmus (Bolbelasmus) unicornis (Coleoptera: Geotrupidae) in Serbia. — European Journal of Entomology, 116: 413—424. doi:10.14411/eje.2019.042
Kostova, R., Bekchiev, R., Beshkov, S., 2019. Coleoptera and Lepidoptera (Insecta) diversity in the central part of Sredna Gora Mountains (Bulgaria). — Bulletin of the Entomological Society of Malta, 10: 75—95. [PDF]
Langourov, M., Simov, N., Bekchiev, R., Chobanov, D., Antonova, V., Dedov, I., 2018. Inventory of Selected Groups of Invertebrates in Sedge and Reedbeds not Associated with Open Waters in Bulgaria. — Acta zoologica bulgarica, 70 (4): 487—500. [PDF]
Bekchiev, R., Guéorguiev, B., Kostova, R., Chehlarov, E., Sivilov, O., 2018. New Records of Rare and Threatened Beetles (Insecta: Coleoptera) in Bulgaria. — Acta zoologica bulgarica, 70 (4): 501—506.
Sabella, G., Bekchiev, R., Kostova, R., 2017. Pselaphinae (Coleoptera Staphylinidae) from Sicily and Calabria (Italy). Results from a short entomological expedition in April, 2015. — 3rd International Congress 'Biodiversity, Mediterranean, Society', September 4th—6th 2015, Volume 8. Biodiversity Journal, Noto-Vendicari (Italy). 185—192 pp. [PDF]
Bekchiev, R., Sivilov, O., Kostova, R., Lapeva-Gjonova, A., 2017. Distribution of Amorphocephala coronata (Germar, 1817) (Coleoptera: Brentidae) in Bulgaria. — ZooNotes, 104: 1—3. [PDF]