. (1991). -. (e15924). Journal of Science,University of Tehran(not publish), 1(0), e15924

. "-" .e15924 , Journal of Science,University of Tehran(not publish), 1, 0, 1991, e15924.

. (1991). '-', Journal of Science,University of Tehran(not publish), 1(0), e15924.

, "-," Journal of Science,University of Tehran(not publish), 1 0 (1991): e15924,

. -. Journal of Science,University of Tehran(not publish). 1991;1(0):e15924 (In Persian).