@article{RM_1966_21_5_a18,
     author = {Ya. I. Zhitomirskii},
     title = {Classes of uniqueness for solution of the {Cauchy} problem},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {21},
     number = {5},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1966_21_5_a18/}
}