Schittenhelm, Bernd, and Troels Richter. “Railway Timetabling Based on Systematic Follow-up on Realized Railway Operations”. Proceedings from the Annual Transport Conference at Aalborg University 16, no. 1 (December 31, 2009). Accessed April 29, 2024. https://journals.aau.dk/index.php/td/article/view/5417.