TY - GEN PB - University of Zielona Góra Press, Poland L1 - http://zbc.uz.zgora.pl/Content/17206/Papers/AMCS_2009_19_4_15.pdf L2 - http://zbc.uz.zgora.pl/Content/17206 T1 - International Journal of Applied Mathematics and Computer Science (AMCS) 2009, volume 19, number 4 UR - http://zbc.uz.zgora.pl/dlibra/docmetadata?id=17206 ER -