(3fSGA GdYQH (B: s (3ehGba(B- (3LQGI (B-(3HdGZI (B/ s - (3cQje YGUis ((3HjQhJ (B: s (3OGQ GdacQ GddHfGfi , s, 1991)
Keywords: (3GdTYQ GdYQHis; (3GdGOH GdYQHis; (3OhGhjf hbUGFOs; (3GdeQCI ai GdGOHs; (3GdeQCI ai GdGSdGes