(3dhGFM GdVQhQI hVeGfI GdQbGHI GdbVGFjI (B:s (3OQGSI JMdjdjI ddbQGQGJ HGdbhGfjf hGdChGeQ GdYScQjI heOi SdWI GdbVGA aj GdQbGHI YdjgG HGdebGQfI eY GdfXe GdeeGKdI aj aQfSG (B/s - (3LeGd GdOjf, SGejs ((3GdEScfOQjI, eUQ (B:s (3efTCI GdeYGQa,s, 1982)
(3HHdjhLQGajI (B: (3U(B. 401-414.s
Keywords: (3GdQbGHI GdbVGFjIs -- (3aQfSGs; (3GdQbGHI GdbVGFjIs -- (3eUQs; (3GdbGfhf GdebGQfs