(3JgPjH eSJeQ GdChgGe Ydi Phj GdeYQaI hChdj GdCagGe (B/s - (3GHf eGchdG, Ydj Hf gHI Gddg Hf Ydj,s 421-475 (3g`(B.s; (3MSf, SjO cSQhjs ((3HjQhJ (B:s (3OGQ GdcJH GdYdejI,s, 1990)
Keywords: (3GdCSeGA hGdcfi hGdCdbGH hGdCfSGH aj GdMOjKs