APA:
Shurulinkov, Peter, Ralev, Andrey, Daskalova, Girgina, Chakarov, Nayden (2007). Distribution, numbers and habitat of pigmy owl Glaucidium passerinum in Rhodopes Mts (S Bulgaria).
Acrocephalus, volume 28, issue 135, str. 159-163.
URN:NBN:SI:DOC-7B6NRWCC from http://www.dlib.si
MLA:
Shurulinkov, Peter, Ralev, Andrey, Daskalova, Girgina, Chakarov, Nayden. "Distribution, numbers and habitat of pigmy owl Glaucidium passerinum in Rhodopes Mts (S Bulgaria)."
Acrocephalus volume 28. issue 135 (2007) str. 159-163.
<http://www.dlib.si/?URN=URN:NBN:SI:DOC-7B6NRWCC>