(3GdGJLGg GdZQHj ef efXGQ GLJeGYj (B/ s - (3Gdfbhj, Ydj eMeO, s; (3eMehO, YHO GdcQje, s ((3WgQGf, GjQGf (B: s (3eYGhfjI GdYdGbGJ GdOhdjI aj efXeI GdGYdGe GdGSdGej, (B409 (3g`(B. = 1989.s, 1989)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B207-231.s
(3GdfU HGddZI GdYQHjI eJQLe ef GddZI GdaGQSjI(B.s
Keywords: (3GdGSdGe hGdZQH(B.s; (3GdMVGQI GdGSdGejIs -- (3GdJCKjQGJ GdZQHjI(B.s; (3GdGSdGe hGdZRh GdacQj(B.s