@article{TRSPY_1997_213_a1,
     author = {Yu. S. Ilyashenko},
     title = {The nonlinear {Riemann--Hilbert} problem},
     journal = {Informatics and Automation},
     pages = {10--34},
     publisher = {mathdoc},
     volume = {213},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1997_213_a1/}
}