@article{IVM_1978_7_a15,
     author = {Yu. V. Golunkov},
     title = {Precomplete classes of algorithms that preserve the membership in a~set},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {93--96},
     publisher = {mathdoc},
     number = {7},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1978_7_a15/}
}