. (3JbfjGJ GdeYdheGJ hGdGJUGdGJ aj GdhWf GdYQHj(B:(3JMOjGJ GdeSJbHds (3hbGFY GdfOhI GdYQHjI GdKGfjI ddeYdheGJ JhfS (B18-21 (3LGfaj (B/ (3jfGjQ (B1989s - (3HhYRI, YHO GdeLjOs; (3bOhQI, hMjOs ((3JhfSs (3efThQGJ GdGJMGO GdYQHj ddecJHGJ hGdeYdheGJs, 1991)
* .(3GdefXeI GdYQHjI ddJQHjI hGdKbGaI hGdYdhe (B*.(3efThQGJ GdGJMGO GdYQHj ddecJHGJ hGdeYdheGJ;(B1 * .(3UaMI YfhGf hfU HGdGfcdjRjI (B* (3eQGLY aj fgGjI HYV GdaUhds
Keywords: (3GdJcfhdhLjG(B-(3NOeGJ GdeYdheGJs -- (3GdYGde GdYQHjs; (3GdecJHGJ(B-(3GdejcfI GdPGJjIs -- (3GdYGde GdYQHjs