@article{10_2307_121073,
     author = {Fang-Hua Lin},
     title = {Gradient estimates and blow-up analysis for stationary harmonic maps},
     journal = {Annals of mathematics},
     year = {1999},
     volume = {149},
     number = {3},
     doi = {10.2307/121073},
     zbl = {0949.58017},
     url = {http://geodesic.mathdoc.fr/articles/10.2307/121073/}
}