On the cone of nonnegative circuitsAlan J. HoffmanCarl W. Lee1986Discrete and Computational GeometryPaper
Two combinatorial properties of a class of simplicial polytopesCarl W. Lee1984Israel Journal of MathematicsPaper
The Numbers of Faces of Polytope Pairs and Unbounded PolyhedraLouis J. BilleraCarl W. Lee1981European Journal of CombinatoricsPaper