TY - JOUR AU - Bappaditya Bhowmik AU - Karl-Joachim Wirths TI - A sharp bound for the Schwarzian derivative of concave functions JO - Colloquium Mathematicum PY - 2012 SP - 245 EP - 251 VL - 128 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm128-2-10/ DO - 10.4064/cm128-2-10 LA - en ID - 10_4064_cm128_2_10 ER -