Gupta, Himanshu, Allen Herman, Alice Lacaze-Masmonteil, Roghayehi Maleki, and Karen Meagher. “On the Second Largest Eigenvalue of Certain Graphs in the Perfect Matching Association Scheme”. The Electronic Journal of Combinatorics 33, no. 3 (August 28, 2026): #P3.39. Accessed August 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v33i3p39.