- Matthias Müller-Hannemann, Federico Perea, editors, 21st Symposium on Algorithmic Approaches for Transportation Modelling, Optimization, and Systems, ATMOS 2021, September 9-10, 2021, Lisbon, Portugal (Virtual Conference). Volume 96 of OASIcs, Schloss Dagstuhl - Leibniz-Zentrum für Informatik, 2021.