Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AMLG_1970__13_137832, author = {M.H. L\"ob and S.S. Wainer}, title = {Hierarchies of number-theoretic functions. {I.}}, journal = {Archiv f\"ur mathematische Logik und Grundlagenforschung}, pages = {39--51}, publisher = {mathdoc}, volume = {13}, year = {1970}, zbl = {0211.31205}, url = {http://geodesic.mathdoc.fr/item/AMLG_1970__13_137832/} }
M.H. Löb; S.S. Wainer. Hierarchies of number-theoretic functions. I.. Archiv für mathematische Logik und Grundlagenforschung, Tome 13 (1970), pp. 39-51. http://geodesic.mathdoc.fr/item/AMLG_1970__13_137832/