(3Mhd GdJGQjN hGdJbOe aj GdhWf GdYQHj (B/ s - (3HOQGf, EHQGgje s ((3HjQhJ (B: s (3GdeDSSI GdYQHjI ddOQGSGJ hGdfTQ, s, 1991)
Keywords: (3GdJbOe GdGLJeGYj s -- (3GdHdGO GdYQHjI s; (3GdHdGO GdYQHjI s -- (3SjGSI KbGajI s; (3GdHdGO GdYQHjI s -- (3CMhGd GLJeGYjI s