Boll DW, Donovan J, Graham RL, Lubachevsky BD. Improving Dense Packings of Equal Disks in a Square. Electron. J. Combin. [Internet]. 2000Aug.1 [cited 2026Mar.16];7(1):R46. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v7i1r46