@InProceedings{accattoli_et_al:LIPIcs.RTA.2012.22,
  author =	{Accattoli, Beniamino and Dal Lago, Ugo},
  title =	{{On the Invariance of the Unitary Cost Model for Head Reduction}},
  booktitle =	{23rd International Conference on Rewriting Techniques and Applications (RTA'12)},
  pages =	{22--37},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-38-5},
  ISSN =	{1868-8969},
  year =	{2012},
  volume =	{15},
  editor =	{Tiwari, Ashish},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.RTA.2012.22},
  URN =		{urn:nbn:de:0030-drops-34820},
  doi =		{10.4230/LIPIcs.RTA.2012.22},
  annote =	{Keywords: lambda calculus, cost models, explicit substitutions, implicit computational complexity}
}