(3GdOdjd GdYUQi ddeJMa GdeUQi (B((3SdSdI UaMGJ ef JGQjN eUQ GdaQYhfjI(B) / s - (3OGQSi LhQLs; (3GfWhGf RcQis ((3GdbGgQI (B: s (3ecJHI eOHhdi , s, 1993)
Keywords: (3JGQjNs; (3eUQ GdbOjeIs; (3GdeJMa GdeUQis; (3GdeJMa GdeUQi (B((3ebJfjGJ(B)s