@article{ASNSP_2005_5_4_2_295_0,
     author = {Baernstein II, Albert and Kovalev, Leonid V.},
     title = {On {H\"older} regularity for elliptic equations of non-divergence type in the plane},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {295--317},
     publisher = {Scuola Normale Superiore, Pisa},
     volume = {Ser. 5, 4},
     number = {2},
     year = {2005},
     mrnumber = {2163558},
     zbl = {1150.35021},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_2005_5_4_2_295_0/}
}