@article{JSFU_2017_10_4_a14,
     author = {Alexander A. Znamenskiy},
     title = {A refinement of {Kovalevskaya's} theorem on analytic solvability of the {Cauchy} problem},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {531--536},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2017_10_4_a14/}
}