%0 Journal Article %A Dolbeault, Jean %A Perthame, Benoît %T Optimal critical mass in the two dimensional Keller–Segel model in $ {\mathbb{R}}^{2}$ %J Comptes Rendus. Mathématique %D 2004 %P 611-616 %V 339 %N 9 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2004.08.011/ %R 10.1016/j.crma.2004.08.011 %G en %F CRMATH_2004__339_9_611_0