TY - JOUR AU - Daniel Kobler AU - André Kündgen TI - Gaps in the chromatic spectrum of face-constrained plane graphs JO - The electronic journal of combinatorics PY - 2001 VL - 8 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.37236/1588/ DO - 10.37236/1588 ID - 10_37236_1588 ER -