@article{IVM_1991_9_a2,
     author = {G. V. Drekova and V. G. Kravchenko},
     title = {On the theory of the normalization of the {Riemann} problem},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {20--28},
     publisher = {mathdoc},
     number = {9},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_9_a2/}
}