@article{DE_1976_12_1_a25,
     author = {G. I. Sulkhanishvili},
     title = {Letter to the editors: {{\textquotedblleft}Difference} schemes of the sixth order of accuracy for a {Poisson} equation of an arbitrary number of dimensions{\textquotedblright} {(Differencial'nye} {Uravnenija} 11 (1975), no.~5, 934{\textendash}936)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {183},
     year = {1976},
     volume = {12},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_1_a25/}
}