@article{KYB_1979_15_2_a1,
     author = {Nekvinda, Miloslav},
     title = {Memory complexity of countable functions},
     journal = {Kybernetika},
     pages = {88--99},
     year = {1979},
     volume = {15},
     number = {2},
     mrnumber = {0542055},
     zbl = {0407.68052},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1979_15_2_a1/}
}