Klotz, Walter, and Torsten Sander. “Integral Cayley Graphs Defined by Greatest Common Divisors”. The Electronic Journal of Combinatorics 18, no. 1 (April 21, 2011): P94. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v18i1p94.