%0 Journal Article %A G. Petkov, Emiliyan %T Development and Implementation of NURBS Models of Quadratic Curves and Surfaces %J Serdica Journal of Computing %D 2009 %P 425-448 %V 3 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJC_2009_3_4_a4/ %G en %F SJC_2009_3_4_a4