Serap BULUT
Research Assistant
Department of Mathematics
Faculty of Arts and Sciences
Balikesir University
10145 Balikesir / TURKEY 

Telephone :	+90 266 612 10 00
Fax             :	+90 266 612 12 15
E-mail        :	sbulut@balikesir.edu.tr
	bulutserap@yahoo.com