@article{DAN_1958_123_2_a6,
     author = {Yu. P. Krivenkov},
     title = {Representations of solutions of {Euler{\textendash}Poisson{\textendash}Darboux} equation with negative coefficient},
     journal = {Doklady Akademii Nauk},
     pages = {239--242},
     year = {1958},
     volume = {123},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_123_2_a6/}
}