@article{DE_1988_24_11_a15,
     author = {S. A. Voitsekhovskii and V. L. Makarov and Yu. I. Rybak},
     title = {Estimates for the rate of convergence of the difference approximation of the {Dirichlet} problem for the equation $-\Delta u+\sum_{|\alpha|\le1}(-1)^{|\alpha|}D^\alpha q_\alpha(x)u=f(x)$ for $q_\alpha(x)\in W_\infty^{\lambda|\alpha|}(\Omega)$, $\lambda\in(0,1]$},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1987--1994},
     publisher = {mathdoc},
     volume = {24},
     number = {11},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_11_a15/}
}