TY - JOUR AU - D. Percivale TI - Upper and Lower Bounds for Poincaré-type Constants in BH JO - Journal of convex analysis PY - 2010 SP - 1089 EP - 1111 VL - 17 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JCA_2010_17_3_JCA_2010_17_3_a21/ ID - JCA_2010_17_3_JCA_2010_17_3_a21 ER -