@article{MZM_1979_26_5_a9,
     author = {Yu. D. Korolkov},
     title = {Families of general recursive functions without isolated points},
     journal = {Matemati\v{c}eskie zametki},
     pages = {747--755},
     year = {1979},
     volume = {26},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1979_26_5_a9/}
}