Cohensius G, Larsson U, Meir R, Wahlstedt D. Cumulative Subtraction Games. Electron. J. Combin. [Internet]. 2019Dec.20 [cited 2026Mar.17];26(4):P4.52. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v26i4p52