Ying-li Kang, Ligang Jin, Yingqian Wang. The 3-colorability of planar graphs without cycles of length 4, 6 and 9. Discrete Mathematics, 339(1):299-307, 2016. [doi]
@article{KangJW16,
title = {The 3-colorability of planar graphs without cycles of length 4, 6 and 9},
author = {Ying-li Kang and Ligang Jin and Yingqian Wang},
year = {2016},
doi = {10.1016/j.disc.2015.08.023},
url = {http://dx.doi.org/10.1016/j.disc.2015.08.023},
researchr = {https://researchr.org/publication/KangJW16},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics},
volume = {339},
number = {1},
pages = {299-307},
}