(3LQGFe GdeNOQGJ (B: s (3OQGSI ebGQfI (B/ s - (3TYHGf, UHGM cQe, s ((3HZOGO (B[(3GdYQGb(B] : s (3TQcI eWHYI GdGOjH GdHZOGOjI GdeMOhOI (B984.s, 1984)
(3GdGUd QSGdI LGeYjI(B((3eGLSJjQ(B) - (3LGeYI HZOGO, cdjI GdbGfhf hGdSjGSjI, (B1977.s
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B241-249.s
Keywords: (3GdeNOQGJ(B.s; (3GdeNOQGJs -- (3bhGfjf hJTQjYGJs -- (3GdYQGb(B.s; (3GdeNOQGJs -- (3bhGfjf hJTQjYGJs -- (3eUQ(B.s; (3GdbGfhf GdebGQf(B.s