@article{TVP_1957_2_3_a5,
     author = {G. Sh. Rubinshtein and K. Urbanik},
     title = {Solution of an {Extremal} {Problem}},
     journal = {Teori\^a vero\^atnostej i ee primeneni\^a},
     pages = {375--377},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TVP_1957_2_3_a5/}
}