1. Adjoints of oriented matroids;Bachem,1984
2. Lattice Theory;Birkhofl,1967
3. Complementary orthogonal subspaces of Rn and orientability of matroids, Ph.D. thesis;Bland,1974
4. A combinatorial abstraction of linear programming;Bland;J. Combin. Theory, Ser. B,1977
5. Orientability of Matroids;Bland;J. Combin. Theory, Ser. B,1978