Wahl, Nathalie Antimatroids of finite character. (English) Zbl 0990.52001 J. Geom. 70, No. 1-2, 168-175 (2001). Reviewer: Günter M.Ziegler (Berlin) MSC: 52A01 05B35 06A15 PDF BibTeX XML Cite \textit{N. Wahl}, J. Geom. 70, No. 1--2, 168--175 (2001; Zbl 0990.52001) Full Text: DOI OpenURL
Faigle, Ulrich Extensions and duality of finite geometric closure operators. (English) Zbl 0434.06004 J. Geom. 14, 23-34 (1980). MSC: 06A06 06A15 PDF BibTeX XML Cite \textit{U. Faigle}, J. Geom. 14, 23--34 (1980; Zbl 0434.06004) Full Text: DOI OpenURL