(3GdhLjR aj GdhUGjG hGdehGQjK (B/s - (3GdSQWGhj, aDGO YHO GddWjas ((3YeGf, GdCQOf (B:s (3OGQ GdHjGQb ddfTQ hGdJhRjY,s, 2000)
(3HHdjhLQGajI (B: (3U(B. 253-256.s
Keywords: (3GdhUGjG (B((3abg ESdGej(B)s; (3GdehGQjK (B((3abg ESdGej(B)s; (3GdeYGedGJ (B((3abg ESdGej(B)s