(3cJGH GdOQGSGJ GdabgjI Ydi ePgH GdEeGe GdTGaYj (B/ s - (3GdTbaI, NGdO Hf YHO Gddgs ((3GdbGgQg (B:s (3OGQ GdSdGe ddWHGYI h GdfTQ h GdJhRjY h GdJQLeI,s, 1989)
Keywords: (3GdESdGes; (3Gdabg GdTGaYjs; (3Gdabg GdESdGejs; (3GdabgGA GdeSdehfs