@article{AA_2011_23_1_a4,
     author = {A. I. Nazarov and N. N. Uraltseva},
     title = {The {Harnack} inequality and related properties for solutions to elliptic and parabolic equations with divergence-free lower-order coefficients},
     journal = {Algebra i analiz},
     pages = {136--168},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2011_23_1_a4/}
}