@article{CRMATH_2004__339_9_611_0,
     author = {Jean Dolbeault and Beno{\^\i}t Perthame},
     title = {Optimal critical mass in the two dimensional {Keller{\textendash}Segel} model in $ {\mathbb{R}}^{2}$},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {611--616},
     publisher = {Elsevier},
     volume = {339},
     number = {9},
     year = {2004},
     doi = {10.1016/j.crma.2004.08.011},
     language = {en},
}