?????????, ??????, ??? . 2002. ? ????? ?? ???????? ?? ??????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 27. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 168?169.

?????????, ??????, ??? . 1991. ???è? ? ??????. ?????????????? ??????????? / ???????????????? ??????????? / Contrastive linguistics 16. (?????????????? ??????????? / ???????????????? ??????????? / Contrastive Linguistics). 15?23.