Marc Bezem, Clemens Grabmayer, Michal Walicki. Expressive power of digraph solvability. Annals of Pure and Applied Logic, 163(3):200-213, 2012. [doi]
@article{BezemGW12,
title = {Expressive power of digraph solvability},
author = {Marc Bezem and Clemens Grabmayer and Michal Walicki},
year = {2012},
doi = {10.1016/j.apal.2011.08.004},
url = {http://dx.doi.org/10.1016/j.apal.2011.08.004},
researchr = {https://researchr.org/publication/BezemGW12},
cites = {0},
citedby = {0},
journal = {Annals of Pure and Applied Logic},
volume = {163},
number = {3},
pages = {200-213},
}