TY - JOUR AU - Michael Shapiro TI - A geometric approach to the almost convexity and growth of some nilpotent groups. JO - Mathematische Annalen PY - 1989 SP - 601 EP - 624 VL - 285 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164620/ ID - MAN_1989__285_1_164620 ER -