@InProceedings{dawar_et_al:LIPIcs.CSL.2021.18,
  author =	{Dawar, Anuj and Sankaran, Abhisekh},
  title =	{{Extension Preservation in the Finite and Prefix Classes of First Order Logic}},
  booktitle =	{29th EACSL Annual Conference on Computer Science Logic (CSL 2021)},
  pages =	{18:1--18:13},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-175-7},
  ISSN =	{1868-8969},
  year =	{2021},
  volume =	{183},
  editor =	{Baier, Christel and Goubault-Larrecq, Jean},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CSL.2021.18},
  URN =		{urn:nbn:de:0030-drops-134520},
  doi =		{10.4230/LIPIcs.CSL.2021.18},
  annote =	{Keywords: finite model theory, preservation theorems, extension closed, composition, Datalog, Ehrenfeucht-Fraisse games}
}