TY - JOUR AU - Sumner, David P. TI - Minimal line graphs JO - Glasgow mathematical journal PY - 1976 SP - 12 EP - 16 VL - 17 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002652/ DO - 10.1017/S0017089500002652 ID - 10_1017_S0017089500002652 ER -