(3GdGYeGd GdTYQjI GdcGedI (B/ s - (3QTjO (B: (3eMeO gGTes ((3GdeOjfI GdefhQI (B: s (3fGOi GdeOjfI GdGOHi (B: s, 1990)
(3eL(B1.(3hQGA GdSQGH (B: (3Ydi OQhH GdTeS (B: (3ai XdGd GdSeGA (B: (3Ydi VaGa GdYbjb (B: (3GdLfGMGf GdNGabGfs
(3ai QCS GdYfhGf (B: (3OjhGf eMeO gGTe QTjOs
(3JbJfi GdecJHI GdLRA GdGhds
Keywords: (3QTjO (B: (3eMeO gGTes -- (3GdeDdaGJ GdcGedIs; (3GdTYQ GdYQHis -- (3OhGhjf h bUGFOs