@InProceedings{asada_et_al:LIPIcs.FSTTCS.2018.14,
  author =	{Asada, Kazuyuki and Kobayashi, Naoki},
  title =	{{Lambda-Definable Order-3 Tree Functions are Well-Quasi-Ordered}},
  booktitle =	{38th IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science (FSTTCS 2018)},
  pages =	{14:1--14:15},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-093-4},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{122},
  editor =	{Ganguly, Sumit and Pandya, Paritosh},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2018.14},
  URN =		{urn:nbn:de:0030-drops-99138},
  doi =		{10.4230/LIPIcs.FSTTCS.2018.14},
  annote =	{Keywords: higher-order grammar, pumping lemma, Kruskal's tree theorem, well-quasi-ordering, simply-typed lambda calculus}
}