@article{DAN_1992_326_4_a1,
     author = {M. G. Zavgorodnii and O. Yu. Litmanovich},
     title = {An analogue of a theorem of {Keldysh} for the multipoint de la {Vall\'ee-Poussin} problem},
     journal = {Doklady Akademii Nauk},
     pages = {589--591},
     publisher = {mathdoc},
     volume = {326},
     number = {4},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_326_4_a1/}
}