Klagstad, H. 1958. The Phonemic System of Colloquial Standard Bulgarian. Slavic and East European Journal 16. 42–54.
@article{klagstad1958,
author = {Klagstad, H.},
journal = {Slavic and East European Journal},
pages = {42–54},
title = {The Phonemic System of Colloquial Standard Bulgarian},
volume = {16},
year = {1958}
}