(3JGQjN CfXeI GdTQWI aj eUQ (B/ s - (3fGUQ GdCfUGQj(B.s ((3GdbGgQI (B: s (3OGQ GdTQhb,s, 1990)
(3HHdjhLQGajI (B: (3UaMI (B165-173.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdVHW GdbVGFjs -- (3eUQs; (3GdCef GdOGNdj s -- (3JGQjNs -- (3eUQ s; (3GdTQWI s -- (3JGQjNs -- (3eUQ s