. (1988). -. (e16554). Journal of Science,University of Tehran(not publish), 3و4(0), e16554

. "-" .e16554 , Journal of Science,University of Tehran(not publish), 3و4, 0, 1988, e16554.

. (1988). '-', Journal of Science,University of Tehran(not publish), 3و4(0), e16554.

, "-," Journal of Science,University of Tehran(not publish), 3و4 0 (1988): e16554,

. -. Journal of Science,University of Tehran(not publish). 1988;3و4(0):e16554 (In Persian).