APA:
Angelova, Dora (2003). Karst types in Bulgaria.
Acta carsologica, volume 32, issue 1, str. 9-18.
URN:NBN:SI:DOC-ENA9CNM1 from http://www.dlib.si
MLA:
Angelova, Dora. "Karst types in Bulgaria."
Acta carsologica volume 32. issue 1 (2003) str. 9-18.
<http://www.dlib.si/?URN=URN:NBN:SI:DOC-ENA9CNM1>