@article{DAN_1986_290_4_a3,
     author = {F. G. Maksudov and M. A. \`Efendiev},
     title = {The nonlinear {Hilbert} problem for a doubly connected domain},
     journal = {Doklady Akademii Nauk},
     pages = {789--791},
     publisher = {mathdoc},
     volume = {290},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_290_4_a3/}
}