Approximation of Convex Bodies by Polytopes with Uniformly Bounded Valences. Jürgen Bokowski; Peter Mani-Levitska — 1987 Monatshefte für Mathematik
Uniform Oriented Matroids Without the Isotopy Property. Bernd Sturmfels; Neil White; B. Jaggi; Peter Mani-Levitska — 1989 Discrete & computational geometry