@InProceedings{grange_et_al:LIPIcs.CSL.2020.23,
  author =	{Grange, Julien and Segoufin, Luc},
  title =	{{Order-Invariant First-Order Logic over Hollow Trees}},
  booktitle =	{28th EACSL Annual Conference on Computer Science Logic (CSL 2020)},
  pages =	{23:1--23:16},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-132-0},
  ISSN =	{1868-8969},
  year =	{2020},
  volume =	{152},
  editor =	{Fern\'{a}ndez, Maribel and Muscholl, Anca},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2020.23},
  URN =		{urn:nbn:de:0030-drops-116661},
  doi =		{10.4230/LIPIcs.CSL.2020.23},
  annote =	{Keywords: order-invariance, first-order logic}
}