@article{GDZPPN00204157X,
title = {Chromatic sums revisited.},
journal = {Aequationes mathematicae},
volume = {49},
year = {1995},
pages = {95-134},
zbl = {0842.05031},
url = {http://dml.mathdoc.fr/item/GDZPPN00204157X}
}
Tutte, W.T. Chromatic sums revisited.. Aequationes mathematicae, Tome 49 (1995) pp. 95-134. http://gdmltest.u-ga.fr/item/GDZPPN00204157X/