|Effect of land abandonment on the vegetation of upland semi-natural grasslands in the Western Balkan Mts., Bulgaria|
K Vassilev, H Pedashenko, SC Nikolov, I Apostolova, J Dengler
Plant Biosystems-An International Journal Dealing with all Aspects of Plant …, 2011
|High juvenile mortality during migration in a declining population of a long‐distance migratory raptor|
S Oppel, V Dobrev, V Arkumarev, V Saravia, A Bounas, E Kret, M Velevski, ...
Ibis 157 (3), 545-557, 2015
|Supplement to: Phylogeography of the capercaillie in Eurasia: what is the conservation status in the Pyrenees and Cantabrian Mounts?|
O DURIEZ, JM SACHET, C MIQUEL, E MENONI, S NIKOLOV, ...
Conservation Genetics 8, 513–526, 2007
|Effects of land abandonment and changing habitat structure on avian assemblages in upland pastures of Bulgaria|
Bird conservation international 20 (2), 200-213, 2010
|From research to implementation: nature conservation in the Eastern Rhodopes mountains (Greece and Bulgaria), European Green Belt|
S Schindler, N Curado, SC Nikolov, E Kret, B Cárcamo, G Catsadorakis, ...
Journal for nature conservation 19 (4), 193-201, 2011
|Population decline and range contraction of the Egyptian Vulture Neophron percnopterus in the Balkan Peninsula|
M Velevski, SC Nikolov, B Hallmann, V Dobrev, L Sidiropoulos, V Saravia, ...
Bird Conservation International 25 (4), 440, 2015
|Assessing the effect of agricultural land abandonment on bird communities in southern-eastern Europe|
S Zakkak, A Radovic, SC Nikolov, S Shumka, L Kakalis, V Kati
Journal of environmental management 164, 171-179, 2015
|Effect of stand age on bird communities in late-successional Macedonian pine forests in Bulgaria|
Forest Ecology and Management 257 (2), 580-587, 2009
|Breeding totals of the ornithofauna in Bulgaria|
D Nankinov, A Dutsov, B Nikolov, G Stoyanov, G Gradev, D Georgiev, ...
Green Balkans, Plovdiv, 2004
|Congregations of wintering Egyptian Vultures Neophron percnopterus in Afar, Ethiopia: present status and implications for conservation|
V Arkumarev, V Dobrev, YD Abebe, G Popgeorgiev, SC Nikolov
Ostrich 85 (2), 139-145, 2014
|Assessing the effectiveness of intensive conservation actions: Does guarding and feeding increase productivity and survival of Egyptian Vultures in the Balkans?|
S Oppel, V Dobrev, V Arkumarev, V Saravia, A Bounas, E Kret, T Skartsi, ...
Biological Conservation 198, 157-164, 2016
|Bird community patterns in sub–Mediterranean pastures: the effects of shrub cover and grazing intensity|
SC Nikolov, DA Demerdzhiev, GS Popgeorgiev, DG Plachiyski
Animal Biodiversity and Conservation 34 (1), 11-21, 2011
|Density, number and habitat use of Common Buzzard (Buteo buteo) wintering in the lowlands of Bulgaria|
S Nikolov, S Spasov, N Kambourova
Buteo 15, 39-47, 2006
|Farmland birds and agricultural land abandonment: evidences from Bulgaria|
S Dyulgerova, M Gramatikov, H Pedashenko, K Vassilev, V Kati, ...
Acta Zoologica Bulgarica 67 (2), 223-234, 2015
|Diet is not related to productivity but to territory occupancy in a declining population of Egyptian Vultures Neophron percnopterus|
V Dobrev, Z Boev, V Arkumarev, D Dobrev, E Kret, V Saravia, A Bounas, ...
Bird Conservation International 26 (3), 273, 2016
|Identifying critical migratory bottlenecks and high‐use areas for an endangered migratory soaring bird across three continents|
ER Buechley, S Oppel, WS Beatty, SC Nikolov, V Dobrev, V Arkumarev, ...
Journal of Avian Biology 49 (7), e01629, 2018
|Spatial and temporal variability in migration of a soaring raptor across three continents|
WL Phipps, P López-López, ER Buechley, S Oppel, E Álvarez, ...
Frontiers in Ecology and Evolution 7, 323, 2019
|Landscape factors affecting territory occupancy and breeding success of Egyptian Vultures on the Balkan Peninsula|
S Oppel, V Dobrev, V Arkumarev, V Saravia, A Bounas, A Manolopoulos, ...
Journal of Ornithology 158 (2), 443-457, 2017
|The influence of land abandonment on farmland bird communities: a case study from a floodplain landscape in Continental Croatia.|
A RADOVIĆ, SC NIKOLOV, N TEPIĆ, K MIKULIĆ, SD JELASKA, ...
Folia Zoologica 62 (4), 269-281, 2013
|Breeding bird atlas of the Ponor Mountains, western Bulgaria|
SC Nikolov, VP Vassilev
Sandgrouse 26 (1), 7-22, 2004