TY - JOUR AU - G. Kalai TI - Rigidity and the lower bound Theorem l. JO - Inventiones mathematicae PY - 1987 SP - 125 EP - 152 VL - 88 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM_1987__88_143447/ ID - IM_1987__88_143447 ER -