TY - GEN PB - University of Zielona Góra Press, Poland L1 - http://www.zbc.uz.zgora.pl/Content/13666/AMCS_18_3_6.pdf L2 - http://www.zbc.uz.zgora.pl/Content/13666 T1 - International Journal of Applied Mathematics and Computer Science (AMCS) 2008, volume 18, number 3 UR - http://www.zbc.uz.zgora.pl/dlibra/docmetadata?id=13666 ER -