Cameron, Peter J, Daniel Johannsen, Thomas Prellberg, and Pascal Schweitzer. “Counting Defective Parking Functions”. The Electronic Journal of Combinatorics 15, no. 1 (July 14, 2008): R92. Accessed March 29, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v15i1r92.