@article{M2AN_1999__33_1_209_0,
     author = {Villani, C\'edric},
     title = {Conservative forms of {Boltzmann's} collision operator : {Landau} revisited},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {209--227},
     publisher = {EDP-Sciences},
     volume = {33},
     number = {1},
     year = {1999},
     mrnumber = {1685753},
     zbl = {0919.35140},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/M2AN_1999__33_1_209_0/}
}