(3faW GdYQGb (B: s (3OQGSI GbJUGOjI SjGSjI (B/ s - (3SdjeGf, MceJ SGej, s ((3HZOGO, GdYQGb (B: s (3hRGQI GdKbGaI hGdGYdGe, (B400 (3g`(B. = 1979.s, 1979)
(3jJVef GQLGYGJ HHdjhLQGajI(B: (3UaMI (B277-280.s
Keywords: (3GdHJQhds -- (3GdYQGbs -- (3JGQjN(B.s; (3GdHJQhds -- (3GbJUGOjGJs -- (3GdYQGb(B.s; (3GdHJQhds -- (3LhGfH SjGSjIs -- (3GdYQGb(B.s