@article{AIHPB_2001__37_4_481_0,
     author = {Fournier, Nicolas},
     title = {Strict positivity of the solution to a $2$-dimensional spatially homogeneous {Boltzmann} equation without cutoff},
     journal = {Annales de l'I.H.P. Probabilit\'es et statistiques},
     pages = {481--502},
     publisher = {Elsevier},
     volume = {37},
     number = {4},
     year = {2001},
     mrnumber = {1876840},
     zbl = {0981.60056},
     language = {en},
     url = {http://www.numdam.org/item/AIHPB_2001__37_4_481_0/}
}