@article{DE_1983_19_7_a15,
     author = {A. V. Koldoba and Yu. A. Poveschenko and Yu. P. Popov},
     title = {Approximation of differential operators on nonorthogonal grids},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1235--1245},
     publisher = {mathdoc},
     volume = {19},
     number = {7},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_7_a15/}
}