@InProceedings{prevosto:DagSemProc.05021.7,
  author =	{Prevosto, Virgile},
  title =	{{Certified mathematical hierarchies: the FoCal system}},
  booktitle =	{Mathematics, Algorithms, Proofs},
  pages =	{1--12},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2006},
  volume =	{5021},
  editor =	{Thierry Coquand and Henri Lombardi and Marie-Fran\c{c}oise Roy},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.05021.7},
  URN =		{urn:nbn:de:0030-drops-2740},
  doi =		{10.4230/DagSemProc.05021.7},
  annote =	{Keywords: Specifications, proofs, inheritance, refinement, types, Focal, Coq, computer algebra, mathematics}
}