(3eOGQS GdGOH GdebGQf (B, (3OQGSI efgLjI (B/ s - (3SYjO YdhTs ((3GdbGgQI (B: s (3GdeQcR GdKbGai GdYQHi , s, 1987)
Keywords: (3GdGOH GdYQHis