Volume 31, Issue 2, July and August 2007, Pages 177-181
A. O. OGRENMIS; E. ERGUT; M. BEKTAS
Volume 30, Issue 3, November and December 2006, Pages 285-289
M. BEKTAS; M. ERGUT
Volume 30, Issue 2, September and October 2006, Pages 235-239
M. BEKTAS; M. YILDIRIM
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