Tomás Müller, Hana Rudová, Roman Barták. Minimal Perturbation Problem in Course Timetabling. In Edmund K. Burke, Michael A. Trick, editors, Practice and Theory of Automated Timetabling V, 5th International Conference, PATAT 2004, Pittsburgh, PA, USA, August 18-20, 2004, Revised Selected Papers. Volume 3616 of Lecture Notes in Computer Science, pages 126-146, Springer, 2004. [doi]