?????, ???????. 1990. ???????????? ??????????? ?? ??????????? ??????? ????? ??? ??????? ?? ?? ??????? ????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 15. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 218?222.

?????, ???????. 1989. ??????????-??????????? ?????????????? ?? ????????? ????????? ?????????? ????????? ? ????????? ????????????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics ??V. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 108?115.

?????, ???????. 1988. ????? ?????? ???? ? ?????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 13. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 127.

?????, ???????. 1987. ?????????????????? ??????? ?? ???????????????? ??? ???????? ? ?????????? ????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 12. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 9?19.

?????, ???????. 1983. ?????? ????????????? ????? ???? ??????? ?? ???????????? ??????? ?? ???????? ? ?????????? ????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 8. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 35?51.

?????, ???????. 1983. ???????????-??????????????? ??????? ?? ???????? ??? ???????? ? ?????????? ????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 8. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 33?41.

?????, ???????. 1980. ??????????????? ??? ?????? -??? ? ?????????? ????.. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics V. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 20?29.

?????, ???????. 1979. ??????????? ??????? ?????? ?????????? ????? ? ???????? ???????????? ??????????? ??? ???????? ????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 4. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 30?41.

?????, ???????. 1977. ?????????????? ????????? ??????? ??? ??????? ? ????????? ???? {(La catégorie grammaticale de temps en fran{\c c}ais et en bulgare)}. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics ??. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 104?143.