The geometric meaning of Nielson's affine invariant norm. - Wendelin L. F. Degen; Volker Milbrandt (Comput. Aided Geom. Des., 1997)

Affin-invariante Interpolation auf Dreiecksnetzen. - Volker Milbrandt (Shaker, 1999)

A Geometrically Motivated Affine Invariant Norm. - Volker Milbrandt (Geometric Modelling, 1999)