Demerdzhiev, D. A., Dobrev, D. D., Delchev, A. G., Angelov, I. D., Terziev, N. G., Iliev, M. D., Georgiev, G. S., Boev, Z. N., Nedyalkov, N. P., Arkumarev, V. S., 2023. Distribution, population status, habitats, and conservation of Lesser Spotted Eagle in Bulgaria. — Proceedings of Conferences Raptors Conservation 2023, Suppl. 2: 32—34. doi:10.19074/1814-8654-2023-2-32-34 [PDF]
Demerdzhiev, D., Angelov, I., Dobrev, D., 2022. Foraging Patterns of Non-Territorial Eastern Imperial Eagle (Aquila heliaca): A Case of Successful Adaptation. — Diversity 14, 1060. doi:10.3390/d14121060 [PDF]
Meyburg, B., Angelov, I., Azar, S., 2020. A corridor of soaring bird migration in Lebanon on the Eastern Mediterranean flyway. — Sandgrouse, 42: 46—58. [PDF]
Arkumarev, V, McGrady, M., Angelov, I., 2020. A literature review of occurrence of Egyptian Vulture (Neophron percnopterus) resident in Africa. — Vulture News, 77: 1—54. [PDF]
Angelov, I, Bougain, C., Schulze, M., al Sariri, T., McGrady, M., Meyburg, B.-U., 2020. Oman confirmed as a stronghold for resident globally endangered Egyptian Vulture (Neophron percnopterus). — Ardea, 108: 73—82. [PDF]
Даскалова, Г., Шурулинков, П., Ангелов, И., Петров, П., 2020. Птиците на Тунджанската хълмиста низина. — Globe Edit, 400 стр.
Angelov, I., Hashim, I., 2019. Birds of prey observed during vulture surveys in northeast Sudan. — Scopus, 39 (2): 1—8. [PDF]
Angelov, I., 2015. Steppe Eagle (Aquila nipalensis). — In: Golemansky, V., Peev, D., Chipev, N., Beron, P., Biserkov, V. (eds). Red Data Book of the Republic of Bulgaria. Volume 2. Animals. Bulgarian Academy of Sciences & Ministry of Environment and Waters, Sofia. [PDF]
Demerdzhiev, D., Hristov, H., Dobrev, D., Angelov, I., Kurtev, M., 2014. Long-term population status, breeding parameters and limiting factors of the Griffon Vulture (Gyps fulvus Hablizl 1783) population in the Eastern Rhodopes, Bulgaria. — Acta Zoologica Bulgarica, 66 (3): 373—384. [PDF]
Nikolov, S., Nikolov, C., Angelov, I., 2013. First record on ground nesting of Egyptian Vulture Neophron percnopterus (Aves: Accipitriformes) in Continental Europe. — Acta Zoologica Bulgarica, 65 (2): 417—419. [PDF]