Atlas of Bulgarian Dialects. Generalising volume. Vol. I – III. Phonetics. Accentuation. Lexicology. Sofia, Trud Publishing House, 2001.
Atlas of Bulgarian Dialects. Generalising volume. Vol. IV. Morphology. Academic Publishing House, 2016.
Atlas of Bulgarian Dialects. Generalising volume. Vol. I – III. Phonetics. Accentuation. Lexicology. Sofia, Trud Publishing House, 2001.