@article{DE_1984_20_8_a22,
     author = {V. D. Didenko},
     title = {Some methods of approximate solution of a four-element generalized {Riemann} boundary value problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1439--1441},
     publisher = {mathdoc},
     volume = {20},
     number = {8},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_8_a22/}
}