(3YGOGJ GdejdGO aj eLJeY GdEeGQGJ GdYQHjI GdeJMOI hbWQ hGdchjJ (B: s (3OQGSI ejOGfjI (B/ s ((3GdEeGQGJ (B: s (3eQcR GdWQGR GdTYHj , s, 1997)
Keywords: 392.1