(3QLhY GdeDef Ydi GdZjQ GdeSDhd Yf GdVQQ (B/ s - (3QVG, YHO Ydj, s ([(3ecGf GdfTQ ZjQ eMOO(B] : s [(3GdfGTQ ZjQ eMOO(B](3 (B983.s, 1983)
(3GdGUd QSGdI LGeYjI (B((3eGLSJjQ(B)-(3LGeYI HZOGO, cdjI GdbGfhf(B.s
(3jJVef EQLGYGJ HHdjhLQGajI (B: (3UaMI (B432-452.s
Keywords: (3GdJCejfs -- (3bGfhf hJTQjYGJ(B.s; (3GdJCejfs -- (3bhGfjf hJTQjYGJs -- (3GdYQGb(B.s