(3Yde faSc GdEfJQfJ aj (B24 (3SGYI (B/ s - (3jhQc HQS(B.s ((3HjQhJ (B: s (3ecJHI dHfGf, s, 2000)
Keywords: (3THcGJ GdMhGSjH(B. s; (3THcGJ GdeYdheGJ(B. s; (3GdEfJQfjJ(B.s