@article{GDZPPN002044757,
title = {Built-up systems of fundamental sequences and hierarchies of number-theoretic functions.},
journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung},
volume = {18},
year = {1977},
pages = {47-54},
zbl = {0358.02061},
url = {http://dml.mathdoc.fr/item/GDZPPN002044757}
}
Schmidt, Diana. Built-up systems of fundamental sequences and hierarchies of number-theoretic functions.. Archiv für mathematische Logik und Grundlagenforschung, Tome 18 (1977) pp. 47-54. http://gdmltest.u-ga.fr/item/GDZPPN002044757/