%0 Journal Article %A B. Rodin %A Zheng-Xu He %A P. Doyle %T Second Derivatives of Circle Packings and Conformai Mappings. %J Discrete & computational geometry %D 1994 %P 35-50 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DCG_1994__11_3_131287/ %F DCG_1994__11_3_131287