Andrzej Ehrenfeucht, Tero Harju, Grzegorz Rozenberg. Finite metrics in switching classes. Discrete Applied Mathematics, 155(1):68-73, 2007. [doi]
@article{EhrenfeuchtHR07,
title = {Finite metrics in switching classes},
author = {Andrzej Ehrenfeucht and Tero Harju and Grzegorz Rozenberg},
year = {2007},
doi = {10.1016/j.dam.2006.04.041},
url = {http://dx.doi.org/10.1016/j.dam.2006.04.041},
researchr = {https://researchr.org/publication/EhrenfeuchtHR07},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {155},
number = {1},
pages = {68-73},
}