Methods for Surface Interrogation. - Hans Hagen; Thomas Schreiber; Ernst Gschwind (IEEE Visualization, 1990)

Curve and Surface Interrogation. - Hans Hagen; Stefanie Hahmann; Thomas Schreiber; Ernst Gschwind; Burkard Wördenweber; Yasuo Nakajima (Focus on Scientific Visualization, 1991)

Generation of solid models from cross sections. - Ernst Gschwind (1992)

Transfinite B-spline Interpolation with Derivates. - Ernst Gschwind; Hans Hagen (CAD Systems Development, 1995)