@article{PMIHES_1992__76__165_0,
     author = {Michael Gromov and Richard Schoen},
     title = {Harmonic maps into singular spaces and $p$-adic superrigidity for lattices in groups of rank one},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {165--246},
     year = {1992},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {76},
     doi = {10.1007/BF02699433},
     mrnumber = {94e:58032},
     zbl = {0896.58024},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02699433/}
}