%0 Journal Article %A Bappaditya Bhowmik %A Karl-Joachim Wirths %T A sharp bound for the Schwarzian derivative of concave functions %J Colloquium Mathematicum %D 2012 %P 245-251 %V 128 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm128-2-10/ %R 10.4064/cm128-2-10 %G en %F 10_4064_cm128_2_10