%0 Conference Proceedings
%F johansen69
%A Johansen, Peter
%T Free groups and regular expressions
%B STOC '69: Proceedings of the first annual ACM symposium on Theory of computing
%P 113-128
%I ACM
%C New York, NY, USA
%U http://www.diku.dk/hjemmesider/ansatte/henglein/papers/johansen1969.pdf
%U http://doi.acm.org/10.1145/800169.805426
%D 1969
%K regexp