1.
Mészáros T, Rónyai L. Shattering-Extremal Set Systems of VC Dimension at most 2. Electron. J. Combin. [Internet]. 2014Nov.6 [cited 2026Apr.5];21(4):P4.30. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i4p30