Ehrenborg, Richard, and Einar Steingrímsson. “Playing Nim on a Simplicial Complex”. The Electronic Journal of Combinatorics 3, no. 1 (March 6, 1996): #R9. Accessed May 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v3i1r9.