Fu, Amy M., and Alain Lascoux. “$q$-Identities Related to Overpartitions and Divisor Functions”. The Electronic Journal of Combinatorics 12, no. 1 (August 5, 2005): #R38. Accessed May 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v12i1r38.