(3CMcGe YbO GdebGhdI (B:s (3OQGSI abgjI bVGFjI ddYbO aj GdbGfhf GdeOfj hGdJLGQj hJWHjbGJ YedjI dCge YbhO GdebGhdI eOYeI HcGaI CMcGe eMceI GdfbV GdUGOQI aj gPG GdTCf aj (B55 (3YGeG (B/s - (3bQI, aJMjIs ((3GdEScfOQjI, eUQ (B:s (3efTCI GdeYGQa,s, 1987)
(3HHdjhLQGajI (B: (3UaMI (B449-451.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3eUQ(B.s -- (3eMceI GdfbVs; (3YbhO GdebGhdIs -- (3bhGfjf hJTQjYGJs -- (3eUQs; (3GdbGfhf GdJLGQjs -- (3eUQs; (3GdYbhO (B((3bGfhf eOfj(B)s -- (3eUQs