TY - JOUR AU - M. Hoffmann AU - I. Juhasz TI - Geometric Aspects of Knot Modification of B-spline Surfaces JO - Journal for geometry and graphics PY - 2002 SP - 141 EP - 15 VL - 6 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JGG_2002_6_2_a3/ ID - JGG_2002_6_2_a3 ER -