APA:
Nikolov, Stoyan Ch., Spasov, Svetoslav D. (2005). Frequency, density and numbers of some breeding birds in the south part of Kresna George (SW Bulgaria).
Acrocephalus, volume 26, issue 124, str. 23-31.
URN:NBN:SI:DOC-3LK4Q1U4 from http://www.dlib.si
MLA:
Nikolov, Stoyan Ch., Spasov, Svetoslav D.. "Frequency, density and numbers of some breeding birds in the south part of Kresna George (SW Bulgaria)."
Acrocephalus volume 26. issue 124 (2005) str. 23-31.
<http://www.dlib.si/?URN=URN:NBN:SI:DOC-3LK4Q1U4>