(3HZOGO (B/ s - (3GdQGS, TQjas ((3HjQhJ (B:s (3eQcR OQGSGJ GdhMOI GdYQHjI,s, 1984)
Keywords: (3GdYQGbs; (3GdQMdGJ h GdSaQs; (3GdCSaGQs; (3fGTFhf UZGQ (B(10-14) (3SfIs