(3RbGb GdeOb (B((3HGdafdfOjI(B) / s - (3fLjH eMahXs ([S.N] : (3GdLGeYI GdGeQjcjI HGdbGgQI , s, 1990)
Keywords: (3GdGOH GdYQHis; (3GdbUI GdYQHjIs; (3fLjH eMahXs