@article{DAN_1990_312_4_a14,
     author = {L. D. Bakhrakh and O. S. Litvinov},
     title = {Solution of a phase problem of wave fields},
     journal = {Doklady Akademii Nauk},
     pages = {841--846},
     publisher = {mathdoc},
     volume = {312},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_312_4_a14/}
}