@InProceedings{braud:LIPIcs.FSTTCS.2009.2310,
author = {Braud, Laurent},
title = {{Covering of ordinals}},
booktitle = {IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science},
pages = {97--108},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-939897-13-2},
ISSN = {1868-8969},
year = {2009},
volume = {4},
editor = {Kannan, Ravi and Narayan Kumar, K.},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.FSTTCS.2009.2310},
URN = {urn:nbn:de:0030-drops-23108},
doi = {10.4230/LIPIcs.FSTTCS.2009.2310},
annote = {Keywords: Ordinal theory, pushdown hierarchy, fundamental sequence, monadic second-order logic, prefix-recognizable graphs}
}