(3JWHjbGJ GdTgGOI aj GdEOGQI GdLfGFjI (B/s - (3YHO GdcQje, eMeO GdaVds; (3GdTjTGfj, YHO GdhgGH YHO GdYRjRs (1987)
(3HHdjhLQGajI (B: (3hQbI (B245-253.s
(3jTJed Ydi eSJNdU HGddZJjf GdYQHjI hGdEfLdjRjI(B.s
Keywords: (3TgGOI GdTghOs -- (3bhGfjf hJTQjYGJs; (3TgGOI GdTghO (B((3abg ESdGej(B)s; (3GdbGfhf GdLfGFjs; (3QSGdI LGeYjI (B((3eGLSJjQ(B)s