(3GdOQGSGJ GdCOHjI(B: (3GdLRA GdKGdK dLejY GdTYH ZjQ GddZI GdYQHjIs - (3GdMGL(B. (3eMeO eUWais ((3GddLfI GdTYHjI GdYGeI ddJYdjes (3djHjGs, 1990)
Keywords: (3GdCOH GdYQHj (B- (3OQGSGJ s; (3GdCOH GdYQHj (B- (3efhYGJ s