@article{TRSPY_1961_64_a2,
     author = {V. S. Vladimirov},
     title = {A~generalization of {Liouville's} theorem},
     journal = {Informatics and Automation},
     pages = {9--27},
     publisher = {mathdoc},
     volume = {64},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1961_64_a2/}
}