Martin Grohe, Martin Otto. Pebble Games and linear equations. Journal of Symbolic Logic, 80(3):797-844, 2015. [doi]
@article{GroheO15,
title = {Pebble Games and linear equations},
author = {Martin Grohe and Martin Otto},
year = {2015},
doi = {10.1017/jsl.2015.28},
url = {http://dx.doi.org/10.1017/jsl.2015.28},
researchr = {https://researchr.org/publication/GroheO15},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Logic},
volume = {80},
number = {3},
pages = {797-844},
}