Clark, William E., and Xiang-dong Hou. “Galkin Quandles, Pointed Abelian Groups, and Sequence A000712”. The Electronic Journal of Combinatorics 20, no. 1 (March 1, 2013): #P45. Accessed May 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i1p45.