Cambie S, Girão A, Kang RJ. VC Dimension and a Union Theorem for Set Systems. Electron. J. Combin. [Internet]. 2019Aug.2 [cited 2026Mar.29];26(3):P3.24. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v26i3p24