Christensen A, Harris PE, Jones Z, Loving M, Ramos Rodríguez A, Rennie J, Rojas Kirby G. A Generalization of Parking Functions Allowing Backward Movement. Electron. J. Combin. [Internet]. 2020Feb.7 [cited 2026Mar.17];27(1):P1.33. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i1p33