@article{10_4153_CJM_1974_084_1,
     author = {Tutte, W. T.},
     title = {Chromatic {Sums} for {Rooted} {Planar} {Triangulations,} {V:} {Special} {Equations}},
     journal = {Canadian journal of mathematics},
     pages = {893--907},
     year = {1974},
     volume = {26},
     number = {4},
     doi = {10.4153/CJM-1974-084-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-084-1/}
}