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 July 6, 2024. http://jgaa-v4.cs.brown.edu/index.php/jgaa/article/view/paper201.