(3GdacQ GdOjfj aj ehGLgI GdYUQ (B: s (3OQGSI JMdjdjg dEJLGgGJ GdJaSjQ aj GdYUQ GdMOjK (B/ s - (3GdTQbGhj, YaJ eMeOs ((3HjQhJ (B: s (3OGQ GdYhOg, s, 1979)
Keywords: (3GdbQBf GdcQje(B. s; (3JaSjQ GdbQBf(B. s