????????, ?????, ??? . 2004. ???????????? ?? ???? ???????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 29. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 125?135.

?????????, ??????, ??? . 1986. ???????????? ?? ????????? ?? ????? ?????????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 11. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 98?107.

?????????, ??????, ??? . 1985. ???????????? ?? ????????? ?? ???? ?????????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 10. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 110?128.