Optimal approximate conversion of spline surfaces. - Josef Hoschek; Franz-Josef Schneider; Peter Wassum (Comput. Aided Geom. Des., 1989)

Chapter 10: Conditions and Constructions for GC1 and GC2 Continuity Between Adjacent Integral Bézier Surface Patches. - Peter Wassum (Topics in Surface Modeling, 1992)

Geometric Continuity between Adjacent Rational Bezier Surface Patches. - Peter Wassum (Geometric Modelling, 1992)

Some remarks on geometric continuity of rational surface patches. - Bert Jüttler; Peter Wassum (Comput. Aided Geom. Des., 1992)