@article{IVM_1980_1_a2,
     author = {V. D. Didenko and N. Ya. Tikhonenko},
     title = {The approximate solution of a~matrix {Riemann} problem},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {16--19},
     publisher = {mathdoc},
     number = {1},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1980_1_a2/}
}