Ábrego, Bernardo M., Silvia Fernández-Merchant, Daniel J. Katz, and Levon Kolesnikov. “On the Number of Similar Instances of a Pattern in a Finite Set”. The Electronic Journal of Combinatorics 23, no. 4 (December 9, 2016): P4.39. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i4p39.