@article{SM_1988_60_1_a15,
     author = {M. V. Safonov},
     title = {Unimprovability of estimates of {H\"older} constants for solutions of linear elliptic equations with measurable coefficients},
     journal = {Sbornik. Mathematics},
     pages = {269--281},
     publisher = {mathdoc},
     volume = {60},
     number = {1},
     year = {1988},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1988_60_1_a15/}
}