Christensen, A., Harris, P.E., Jones, Z., Loving, M., Ramos Rodríguez, A., Rennie, J. and Rojas Kirby, G. 2020. A Generalization of Parking Functions Allowing Backward Movement. The Electronic Journal of Combinatorics. 27, 1 (Feb. 2020), P1.33. DOI:https://doi.org/10.37236/8948.