TY - JOUR AU - Matthias Keller TI - An overview of curvature bounds and spectral theory of planar tessellations JO - Actes des rencontres du CIRM PY - 2013 SP - 61 EP - 68 VL - 3 IS - 1 PB - CIRM UR - https://acirm.centre-mersenne.org/articles/10.5802/acirm.55/ DO - 10.5802/acirm.55 LA - en ID - ACIRM_2013__3_1_61_0 ER -