@article{ASNSP_1981_4_8_2_285_0,
     author = {Campanato, S. and Cannarsa, P.},
     title = {Differentiability and partial {H\"older} continuity of the solutions of non-linear elliptic systems of order $2m$ with quadratic growth},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {285--309},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 8},
     number = {2},
     year = {1981},
     mrnumber = {623938},
     zbl = {0474.35048},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1981_4_8_2_285_0/}
}