@article{1077310237,
author = {Mitchem, John},
title = {Every planar graph has an acyclic $8$ -coloring},
journal = {Duke Math. J.},
volume = {41},
number = {1},
year = {1974},
pages = { 177-181},
language = {en},
url = {http://dml.mathdoc.fr/item/1077310237}
}
Mitchem, John. Every planar graph has an acyclic $8$ -coloring. Duke Math. J., Tome 41 (1974) no. 1, pp. 177-181. http://gdmltest.u-ga.fr/item/1077310237/