@article{TM_1958_52_a4,
     author = {\`E. S. Orlovskii},
     title = {Some questions in the theory of algorithms},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {140--171},
     year = {1958},
     volume = {52},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1958_52_a4/}
}