(3GUhd Yde GdGLQGe (B/ s - (3MHjH, eMeO TdGd, s ((3HZOGO (B[(3GdYQGb(B] : s (3hRGQI GdJYdje GdYGdj hGdHMK GdYdej, LGeYI HZOGO, (B411 (3g`(B. = 1990.s, 1990)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B293-303.s
Keywords: (3Yde GdGLQGe(B.s; (3GdLQjeI hGdeLQehf(B.s; (3GdYbhHGJ(B.s