Bull. Korean Math. Soc. 2010; 47(6): 1121-1129
Printed November 1, 2010
https://doi.org/10.4134/BKMS.2010.47.6.1121
Copyright © The Korean Mathematical Society.
\"{O}znur G\"{o}lba\c{s}\i and Emine Ko\c{c}
Cumhuriyet University, Cumhuriyet University
2023; 60(5): 1281-1293
2005; 42(4): 679-690
2006; 43(3): 635-644
2008; 45(4): 621-629
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