@article{JEMS_2004_6_3_a3,
     author = {Jean-Michel Coron and Emmanuelle Cr\'epeau},
     title = {Exact boundary controllability of a nonlinear {KdV} equation with critical lengths},
     journal = {Journal of the European Mathematical Society},
     pages = {367--398},
     publisher = {mathdoc},
     volume = {6},
     number = {3},
     year = {2004},
     doi = {10.4171/jems/13},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/13/}
}