(3GYeGd fOhI efXeI GdJLGQI GdYGdejI (B: s (3heUGdM TYhH GdLfhH(B: (3GdbGgQI (B/ (3GcJhHQ (B2001 / s - (3aNQi dHjHs ((3GdbGgQI (B: s (3eQcR GdHMhK GdYQHjI , s, 2001)
Keywords: (3GdJYGhf GdOhdis; (3GdGJaGbjGJ GdJLGQjIs; (3efXeI GdJLGQI GdYGdejIs