???????, ????, ????  ?????? & ???  ??????. 1990. ????????????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 15. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 102?105.

??????, ????, ???  ?????? & ????  ???????. 1984. ??? ???????????????? ?? ??????? ?????? ? ????????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 9. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 29?43.

??????, ???. 1981. ?????? ??????? ??? ????? ??????????? ??????? ? ??????????? ????? (???. ê{\^?ë-äà, ð1ñàëè, {\"?{\^?ãà{íú). ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 6. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 150?152.