@incollection{Diekert/93b,
AUTHOR = {Diekert, Volker},
TITLE = {Rewriting, M{\"o}bius functions and semi-commutations},
BOOKTITLE = {Proceedings of the 9th International Conference on Fundamentals of Computation Theory. FCT '93 (Szeged, Hungary, August 1993)},
SERIES = {LNCS},
VOLUME = {710},
PAGES = {1-15},
YEAR = {1993},
EDITOR = {Zolt{\'a}n, {\'e}sik},
URL = {http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=710&spage=1},
PUBLISHER = {Springer-Verlag},
ADDRESS = {Berlin-Heidelberg-New York-London-Paris-Tokyo-Hong Kong-Barcelona-Budapest},
}
@incollection{Roka/93,
AUTHOR = {R{\'o}ka, Zsuzsanna},
TITLE = {One-way cellular automata on Cayley graphs},
BOOKTITLE = {Proceedings of the 9th International Conference on Fundamentals of Computation Theory. FCT '93 (Szeged, Hungary, August 1993)},
SERIES = {LNCS},
VOLUME = {710},
PAGES = {406-417},
YEAR = {1993},
EDITOR = {Zolt{\'a}n, {\'e}sik},
URL = {http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=710&spage=406},
PUBLISHER = {Springer-Verlag},
ADDRESS = {Berlin-Heidelberg-New York-London-Paris-Tokyo-Hong Kong-Barcelona-Budapest},
}