(3fgGjI YgO GdhXjaI (B:s (3JCdja LjQej Qjacf(B.s - (3Qjacjf, LjQejs ((3CHh XHj (B:s (3eQcR GdEeGQGJ ddOQGSGJ hGdHMhK GdGSJQGJjLjI,s, 2000)
(3HHdjhLQajI (B: (3UaMI (B469-475.s
Keywords: (3Gdbhi GdYGedIs -- (3LhGfH GbJUGOjIs; (3GdYed hGdYeGds -- (3LhGfH GbJUGOjIs