Levit, Vadim E.

• The Electronic Journal of Combinatorics Volume 10 (2003) - Research Papers
  Correspondence between two Antimatroid Algorithmic Characterizations
  Abstract  PDF
• The Electronic Journal of Combinatorics Volume 21, Issue 1 (2014) - Papers
  A Set and Collection Lemma
  Abstract  PDF  A Set and Collection Lemma  Official source