@article{10_1090_S0894_0347_05_00499_6,
     author = {Merle, Frank and Raphael, Pierre},
     title = {On a sharp lower bound on the blow-up rate for the {{\dh}{\textquestiondown}\^A{\texttwosuperior}} critical nonlinear {Schr\~A{\textparagraph}dinger} equation},
     journal = {Journal of the American Mathematical Society},
     pages = {37--90},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2006},
     doi = {10.1090/S0894-0347-05-00499-6},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-05-00499-6/}
}