References
- Abh. Math. Sem Univ Hamburg v.25 On rigid circuit graphs G. A. Dirac
- Trans. Amer. Math. Soc. v.271 Varieties of combinatorial geometries J. Kahn;J. P. S. Kung
- Algebra Universalis v.1 Modular elements of geometric R. P. Stanley
- Matroid theory D. J. A. Welsh
- Discrete Appl. Math. v.4 Signed graphs T. Zaslavsky
- Discrete Appl. Math. v.5 erratum T. Zaslavsky