Visualizing Critical Points of Arbitrary Poincaré-Index. - Gerik Scheuermann; Hans Hagen; Heinz Krüger; Alyn P. Rockwood (Scientific Visualization, 1997)

Clifford Algebra in Vector Field Visualization. - Gerik Scheuermann; Hans Hagen; Heinz Krüger (VisMath, 1997)

Visualization of higher order singularities in vector fields. - Gerik Scheuermann; Hans Hagen; Heinz Krüger; Martin Menzel; Alyn P. Rockwood (IEEE Visualization, 1997)

Visualizing Nonlinear Vector Field Topology. - Gerik Scheuermann; Heinz Krüger; Martin Menzel; Alyn P. Rockwood (IEEE Trans. Vis. Comput. Graph., 1998)