TY - JOUR AU - Dirac, G.A. TI - Some Results Concerning the Structure of Graphs JO - Canadian mathematical bulletin PY - 1963 SP - 183 EP - 210 VL - 6 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1963-019-5/ DO - 10.4153/CMB-1963-019-5 ID - 10_4153_CMB_1963_019_5 ER -