Zdenek Dvorák, Jean-Sébastien Sereni. Do Triangle-Free Planar Graphs have Exponentially Many $3$-Colorings?. Electr. J. Comb., 24(3):3, 2017. [doi]
@article{DvorakS17-0,
title = {Do Triangle-Free Planar Graphs have Exponentially Many $3$-Colorings?},
author = {Zdenek Dvorák and Jean-Sébastien Sereni},
year = {2017},
url = {http://www.combinatorics.org/ojs/index.php/eljc/article/view/v24i3p47},
researchr = {https://researchr.org/publication/DvorakS17-0},
cites = {0},
citedby = {0},
journal = {Electr. J. Comb.},
volume = {24},
number = {3},
pages = {3},
}