(3GOdI GdbGfhf ZjQ GdeHGTQI (B/ s - (3Gejf, egOj UGdM eMeO, s ((3HZOGO (B[(3GdYQGb(B] : s (3eWHYI hGhaSjJ GdeTQb (B987.s, 1987)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B227-228.s
Keywords: (3GdGKHGJ (B((3bGfhf(B)s -- (3GdYQGb(B.s