Walter Wenzel Algebraic relations between matroids connected by weak homomorphisms. [Citation Graph (0, 0)][DBLP] J. Comb. Theory, Ser. A, 1990, v:54, n:2, pp:210-224 [Journal]

Robert A. Proctor Solution of a sperner conjecture of stanley with a construction of gelfand. [Citation Graph (0, 0)][DBLP] J. Comb. Theory, Ser. A, 1990, v:54, n:2, pp:225-234 [Journal]

Robert A. Proctor Product evaluations of lefschetz determinants for grassmannians and of determinants of multinomial coefficients. [Citation Graph (0, 0)][DBLP] J. Comb. Theory, Ser. A, 1990, v:54, n:2, pp:235-247 [Journal]