@article{DE_1992_28_5_a15,
     author = {P. A. Krutitskii},
     title = {On the equivalence of the oblique derivative problem and the {Riemann--Hilbert} problem},
     journal = {Differencialʹnye uravneni\^a},
     pages = {856--867},
     publisher = {mathdoc},
     volume = {28},
     number = {5},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_5_a15/}
}