Amir Pirnazar, Daniel Ullman. Girth and fractional chromatic number of planar graphs. Journal of Graph Theory, 39(3):201-217, 2002. [doi]
@article{PirnazarU02,
title = {Girth and fractional chromatic number of planar graphs},
author = {Amir Pirnazar and Daniel Ullman},
year = {2002},
doi = {10.1002/jgt.10024},
url = {http://dx.doi.org/10.1002/jgt.10024},
researchr = {https://researchr.org/publication/PirnazarU02},
cites = {0},
citedby = {0},
journal = {Journal of Graph Theory},
volume = {39},
number = {3},
pages = {201-217},
}