(3GdYdGbI Hjf GdefWb hGdabg YfO eacQi GdGSdGe (B: s ( (3bQGAI ai GdacQ GdGTYQi(B) / s - (3eMehO eMeO Ydi eMeOs ((3GdbGgQI (B: s (3Yjf ddOQGSGJ hGdHMhK GdGfSGfjI hGdGLJeGYjI , s, 2000)
Keywords: (3GdadSaI GdGSdGejIs; (3GdMQcGJ GdacQjI YfO GdeSdejfs; (3GdadGSaI GdeSdehfs; (3GdGTGYQIs; (3GHf MRe, GHheMeO Ydi Hf GMeOs; (3GdTGaYi(B: (3GHhYHOGddg eMeO Hf GOQjS Hf GdYHGS Hf YKeGf Hf TGaY Hf GdSGFHs; (3Gdabg GdGSdGei , CUhds; (3GdefWb YfO GdTGaYis; (3GdefWb YfO GdGTGYQIs