(3GdGUdGM GdGbJUGOi ai eUQ (B: s (3OhQ GdHfhc ai GdNUNUI hGge GdJLGQH GdOhdjI (B/ s - (3efi bGSes ((3GdbGgQI (B: s (3GdOGQ GdeUQjI GddHfGfjI , s, 1997)
Keywords: (3GdGbJUGOs; (3GdGMhGd GdGbJUGOjIs; (3GdHfhcs; (3GdShbs; (3GdNUNUIs; (3GdGbJUGO (B- (3eUQs; (3eUQ (B- (3GdGMhGd GdGbJUGOjIs