Wilfried Imrich, Werner Klöckl. Factoring directed graphs with respect to the cardinal product in polynomial time. Discussiones Mathematicae Graph Theory, 27(3):593-601, 2007. [doi]
@article{ImrichK07,
title = {Factoring directed graphs with respect to the cardinal product in polynomial time},
author = {Wilfried Imrich and Werner Klöckl},
year = {2007},
url = {http://www.discuss.wmie.uz.zgora.pl/gt/27_3/gt27-471.htm},
tags = {graph-rewriting, rewriting},
researchr = {https://researchr.org/publication/ImrichK07},
cites = {0},
citedby = {0},
journal = {Discussiones Mathematicae Graph Theory},
volume = {27},
number = {3},
pages = {593-601},
}