(3GdhSjW aj GdLfMI GdeHGTQI hGdOYhi GdeOfjI CeGe GdbVGA GdLfGFj (B: s (3TQM dCMcGe GdOYhjJf hTQhWgeG GdTcdjI hGdehVhYjI (B... /s - (3YHO GdJhGH, eYhV s ((3GdEScfOQjI, eUQ (B: s (3OGQ GdeWHhYGJ GdLGeYjI, s, 1989)
(3edGMb (B: (3U(B. 267-269.s
(3HHdjhLQGajI (B: (3U(B. 257. s
Keywords: (3GdOYGhj hGdHjfGJ s -- (3eUQ s; (3GdOYhi GdeOfjIs -- (3eUQ s; (3GdbGfhf GdLfGFj s -- (3eUQ s