Vassileva, Radka & Christo  Stamenov. 1992. Bibliography of Jana Molhova?s works. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 17. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 10.

Scatton, Ernest A. 1991. Bibliography of Bulgarian linguistics in the Unit?d States. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 16. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 117?128.