Lia S, Van de Voorde G. A Note on Strong Blocking Sets and Higgledy-Piggledy Sets of Lines. Electron. J. Combin. [Internet]. 2025Aug.8 [cited 2026Mar.30];32(3):P3.27. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v32i3p27