On the Realization of Convex Polytopes, Euler's Formula and Möbius Functions BERNT LINDSTRÖM — 1971 Aequationes mathematicae
On the Realization of Convex Polytopes, Euler's Formula and Möbius Functions (Short Communication) BERNT LINDSTRÖM — 1971 Aequationes mathematicae
On P-polynomial representations of projective geometries in algebraic combinatorial geometries. Bernt Lindström — 1988 Mathematica Scandinavica