Central European Journal of Mathematics
Central European Journal of Mathematics > 2009 > 7 > 4 > 683-693
Central European Journal of Mathematics > 2009 > 7 > 4 > 725-731
Central European Journal of Mathematics > 2009 > 7 > 4 > 606-616
Central European Journal of Mathematics > 2009 > 7 > 4 > 670-682
Central European Journal of Mathematics > 2009 > 7 > 4 > 757-774
Central European Journal of Mathematics > 2009 > 7 > 4 > 775-786
Central European Journal of Mathematics > 2009 > 7 > 4 > 660-669
Central European Journal of Mathematics > 2009 > 7 > 4 > 804-808