@article{ASNSP_1972_3_26_2_391_0,
     author = {Piccinini, L. C. and Spagnolo, S.},
     title = {On the {H\"older} continuity of solutions of second order elliptic equations in two variables},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {391--402},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 26},
     number = {2},
     year = {1972},
     mrnumber = {361422},
     zbl = {0237.35028},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1972_3_26_2_391_0/}
}