TY - JOUR T1 - Transition from circle packing to covering on a sphere: the odd case of 13 circles JO - P ROY SOC LOND A MAT PY - 1999/12/08 AU - Fowler PW AU - Tarnai T ED - VL - 455 IS - 1992 SP - 4131 EP - 4143 Y2 - 2024/12/22 ER -