J. Korean Math. Soc. 1996; 33(3): 527-539
Printed September 1, 1996
Copyright © The Korean Mathematical Society.
LeRoy B. Beasley, Gwang-Yeon Lee, and Sang-Gu Lee
Utah State University, Hanseo University, and SungKyunKwan University
2014; 51(1): 113-123
2013; 50(1): 127-136
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