@article{ZNSL_1980_96_a25,
     author = {M. V. Safonov},
     title = {The {Harnack} inequality for elliptic equations and {H\"older} continuity of their solutions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {272--287},
     publisher = {mathdoc},
     volume = {96},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1980_96_a25/}
}