Bast, Hannah, and Sabine Storandt. “Frequency Data Compression for Public Transportation Network Algorithms (Extended Abstract)”. Proceedings of the International Symposium on Combinatorial Search 4, no. 1 (August 20, 2021): 205-206. Accessed April 30, 2026. https://ojs.aaai.org/index.php/SOCS/article/view/18302.