@article{1214461173, author = {H\'elein, Fr\'ed\'eric}, title = {Willmore immersions and loop groups}, journal = {J. Differential Geom.}, volume = {48}, number = {1}, year = {1998}, pages = { 331-385}, language = {en}, url = {http://dml.mathdoc.fr/item/1214461173} }
Hélein, Frédéric. Willmore immersions and loop groups. J. Differential Geom., Tome 48 (1998) no. 1, pp. 331-385. http://gdmltest.u-ga.fr/item/1214461173/