@InProceedings{brocken_et_al:LIPIcs.FUN.2021.15,
  author =	{Brocken, Thomas and van der Heijden, G. Wessel and Kostitsyna, Irina and Lo-Wong, Lloyd E. and Surtel, Remco J. A.},
  title =	{{Multi-Robot Motion Planning of k-Colored Discs Is PSPACE-Hard}},
  booktitle =	{10th International Conference on Fun with Algorithms (FUN 2021)},
  pages =	{15:1--15:16},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-145-0},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{157},
  editor =	{Farach-Colton, Martin and Prencipe, Giuseppe and Uehara, Ryuhei},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.FUN.2021.15},
  URN =		{urn:nbn:de:0030-drops-127769},
  doi =		{10.4230/LIPIcs.FUN.2021.15},
  annote =	{Keywords: Disc-robot motion planning, algorithmic complexity, PSPACE-hard}
}