Bistra Andreeva and
Jacques Koreman. The status of vowel devoicing in Bulgarian : phonetic or phonological? In Formal description of Slavic languages : the fifth conference, Leipzig 2003 ; [... contributions to the Fifth European Conference on Formal Description of Slavic Languages (FDSL-5)]. - Frankfurt, M. [u.a.] : Lang, 2008. - (Linguistik international ; 20),, 0. google Note: WB.
