Matroid Theory, 1992. ,
DOI : 10.1093/acprof:oso/9780198566946.001.0001
Matroid Theory, 1976. ,
Theory of Matroids, 1986. ,
DOI : 10.1017/CBO9780511629563
Combinatorial Mathematics and its Applications, 1971. ,
Enumerating Low Rank Matroids and Their Asymptotic Probability of Occurrence, 2001. ,
The On?line Encyclopedia of Integer Sequences, published electronically at, 2001. ,