(3eYLe GdTjhN (B/s - (3GHf YSGcQ, Ydj Hf GdMSf Hf gHI Gddg,s 499-571 (3g`(B.s; (3Jbj GdOjf, haGAs; (3GdaMGe, TGcQs ((3OeTb (B:s (3OGQ GdHTGFQ,s, 2000)
Keywords: (3GdMOjKs -- (3JQGLe GdQhGI hGdMaGXs