TY  - JOUR
AU  - Tutte, W. T.
TI  - Chromatic Sums for Rooted Planar Triangulations II: The Case λ = τ + 1
JO  - Canadian journal of mathematics
PY  - 1973
SP  - 657
EP  - 671
VL  - 25
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-066-8/
DO  - 10.4153/CJM-1973-066-8
ID  - 10_4153_CJM_1973_066_8
ER  -