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@article{CMH_1991__66_4_140234, author = {Ma Li}, title = {Harmonic map heat flow with free boundary.}, journal = {Commentarii mathematici Helvetici}, pages = {279--301}, publisher = {mathdoc}, volume = {66}, number = {4}, year = {1991}, zbl = {0727.53044}, url = {http://geodesic.mathdoc.fr/item/CMH_1991__66_4_140234/} }
Ma Li. Harmonic map heat flow with free boundary.. Commentarii mathematici Helvetici, Tome 66 (1991) no. 4, pp. 279-301. http://geodesic.mathdoc.fr/item/CMH_1991__66_4_140234/