@article{DE_1981_17_11_a16,
     author = {V. D. Didenko and N. Ya. Tikhonenko},
     title = {Approximate solution of the matrix {Riemann} problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2086--2089},
     publisher = {mathdoc},
     volume = {17},
     number = {11},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_11_a16/}
}