@article{VTGU_2007_1_a4,
     author = {V. M. Miklyukov},
     title = {Maximum principle for difference of almost solutions of elliptic equations},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {33--45},
     year = {2007},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2007_1_a4/}
}