Georgiev et al. 1971
Georgiev, Vladimir. I. (ed.). 1971. Balgarski etimologichen rechnik. Vol. I: А-З. Sofia: Bulgarian Academy of Sciences.
@edited-book{ address = {Sofia}, booktitle = {Balgarski etimologichen rechnik. Vol. I: А-З}, editor = {Georgiev, Vladimir. I.}, publisher = {Bulgarian Academy of Sciences}, year = {1971} }