@article{MZM_2005_77_5_a0,
     author = {I. V. Vyugin},
     title = {Constructive {Solvability} {Conditions} for the {Riemann--Hilbert} {Problem}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {643--655},
     publisher = {mathdoc},
     volume = {77},
     number = {5},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2005_77_5_a0/}
}