Gilles Didier, Thomas Schmidt, Jens Stoye, Dekel Tsur. Character sets of strings. J. Discrete Algorithms, 5(2):330-340, 2007. [doi]
@article{DidierSST07,
title = {Character sets of strings},
author = {Gilles Didier and Thomas Schmidt and Jens Stoye and Dekel Tsur},
year = {2007},
doi = {10.1016/j.jda.2006.03.021},
url = {http://dx.doi.org/10.1016/j.jda.2006.03.021},
researchr = {https://researchr.org/publication/DidierSST07},
cites = {0},
citedby = {0},
journal = {J. Discrete Algorithms},
volume = {5},
number = {2},
pages = {330-340},
}