TY - JOUR AU - Everett, C. J. TI - On the Basis and Chromatic Number of a Graph JO - Canadian journal of mathematics PY - 1966 SP - 969 EP - 973 VL - 18 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1966-097-6/ DO - 10.4153/CJM-1966-097-6 ID - 10_4153_CJM_1966_097_6 ER -