TY - JOUR AU - Lorenzo Giacomelli AU - Günther Grün TI - Lower bounds on waiting times for degenerate parabolic equations and systems JO - Interfaces and free boundaries PY - 2006 SP - 111 EP - 129 VL - 8 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4171/ifb/137/ DO - 10.4171/ifb/137 ID - 10_4171_ifb_137 ER -