@article{DAN_1976_226_5_a3,
     author = {L. A. Ivanov},
     title = {The {Cauchy{\textendash}Kovalevskaja} theorem for equations with singularities},
     journal = {Doklady Akademii Nauk},
     pages = {1005--1008},
     year = {1976},
     volume = {226},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_5_a3/}
}