(3GdYde hGdSjGSI GdYdejI aj GdhWf GdYQHj (B/ s - (3RMdGf, GfWhGf, s ((3HjQhJ, dHfGf (B: s (3eQcR OQGSGJ GdhMOI GdYQHjI (B979.s, 1979)
(3jJVef edGMb(B.s
(3jJVef EQLGYGJ HHdjhLQGajI (B: (3UaMI (B265-272.s
Keywords: (3GdJYdje GdYGdjs -- (3HMhK(B.s; (3GdYdhes -- (3GdHdGO GdYQHjI(B.s; (3GdYdhe GdYQHjI(B.s