(3CMhGd GdQLGd (B/s - (3GdLhRLGfj, EHQGgje Hf jYbhH Hf ESMGb,s (3J(B. 259 (3g`(B.s; (3GdSeQGFj, UHMj GdHOQjs ((3HjQhJ (B:s (3eDSSI GdQSGdI,s, 1985)
(3cTGaGJ (B: (3U(B. 217-226.s
(3HHdjhLQGajI (B: (3U(B. 219-233.s
Keywords: (3GdMOjKs -- (3JQGLe GdQhGIs