(3HYV GdLQGFe GdefUhU YdjgG ai GdeOhfg GdYbGHjI (B: s (3GdLQGFe GdeVQg HGdeUdMg GdYGeI(B/s - (3QeSjS HgfGes ((3GdGScfOQjI (B:s (3efTGI GdeYGQa (B,s, 2001)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdLfGFi s; (3GdLQGFe GdeVQI HGdeUdMI GdYGeIs