@article{TRSPY_1958_52_a2,
     author = {N. M. Nagornyi},
     title = {A minimal alphabet of algorithms over a given alphabet},
     journal = {Informatics and Automation},
     pages = {66--74},
     publisher = {mathdoc},
     volume = {52},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1958_52_a2/}
}