E. Demaine, S. Fekete, P. Keldenich, C. Scheffer, and H. Meijer. 34th International Symposium on Computational Geometry, SoCG 2018, June 11-14, 2018, Budapest, Hungary, volume 99 of LIPIcs, page 29:1--29:15. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, (2018)