???????, ?????, ??? . 1997. ????????? ??????? ??????? one ? ?? ????????????? ???????????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 22. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 18?46.

???????, ?????, ??? . 1981. ???????????? ??????????? ?? ??????????? it ? ?????????? ????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 6. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 39?47.

???????, ?????, ??? . 1980. ??????? ????? ?? ????????????? ? ???????? ???????????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 5. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 80.