Kluge, Sebastian, Martin Brokate, and Konrad Reif. “New Complexity Results for Time-Constrained Dynamical Optimal Path Problems”. Journal of Graph Algorithms and Applications 14, no. 2 (January 1, 2010): 123–147. Accessed May 1, 2025. https://www.jgaa.info/index.php/jgaa/article/view/paper201.