@article{AIHPA_1987__46_1_97_0,
     author = {Choquet Bruhat, Yvonne},
     title = {Global existence theorems for hyperbolic harmonic maps},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {97--111},
     publisher = {Gauthier-Villars},
     volume = {46},
     number = {1},
     year = {1987},
     mrnumber = {877997},
     zbl = {0608.58018},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1987__46_1_97_0/}
}