%0 Journal Article %A Villani, Cédric %T Conservative forms of Boltzmann's collision operator : Landau revisited %J ESAIM: Mathematical Modelling and Numerical Analysis %D 1999 %P 209-227 %V 33 %N 1 %I EDP-Sciences %U http://geodesic.mathdoc.fr/item/M2AN_1999__33_1_209_0/ %G en %F M2AN_1999__33_1_209_0