@article{CMH_1995__70_3_140387,
     author = {J\"urgen Jost},
     title = {Convex functionals and generalized harmonic maps into spaces of non positive curvature.},
     journal = {Commentarii mathematici Helvetici},
     pages = {659--673},
     publisher = {mathdoc},
     volume = {70},
     number = {3},
     year = {1995},
     zbl = {0852.58022},
     url = {http://geodesic.mathdoc.fr/item/CMH_1995__70_3_140387/}
}