Peter Damaschke. Two Robots Patrolling on a Line: Integer Version and Approximability. In Leszek Gasieniec, Ralf Klasing, Tomasz Radzik, editors, Combinatorial Algorithms - 31st International Workshop, IWOCA 2020, Bordeaux, France, June 8-10, 2020, Proceedings. Volume 12126 of Lecture Notes in Computer Science, pages 211-223, Springer, 2020. [doi]
Abstract is missing.