@inproceedings{RTA-1998-Schmidt,
	author        = "Renate A. Schmidt",
	booktitle     = "{Proceedings of the Ninth International Conference on Rewriting Techniques and Applications}",
	doi           = "10.1007/BFb0052364",
	editor        = "Tobias Nipkow",
	isbn          = "3-540-64301-X",
	pages         = "106--120",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{\emph{E}-Unification for Subsystems of \emph{S4}}",
	volume        = 1379,
	year          = 1998,
}