@article{DE_1991_27_7_a6,
     author = {V. V. Drits},
     title = {Conservative difference schemes in problems of nonlinear optics. {I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1153--1161},
     publisher = {mathdoc},
     volume = {27},
     number = {7},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_7_a6/}
}