Yves Aubry, Jean-Christophe Godin, Olivier Togni. Every triangle-free induced subgraph of the triangular lattice is (5m, 2m)-choosable. Discrete Applied Mathematics, 166:51-58, 2014. [doi]
@article{AubryGT14,
title = {Every triangle-free induced subgraph of the triangular lattice is (5m, 2m)-choosable},
author = {Yves Aubry and Jean-Christophe Godin and Olivier Togni},
year = {2014},
doi = {10.1016/j.dam.2013.09.028},
url = {http://dx.doi.org/10.1016/j.dam.2013.09.028},
researchr = {https://researchr.org/publication/AubryGT14},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {166},
pages = {51-58},
}