@article{JRAM_1966__222_150728,
     author = {E.M. Horadam},
     title = {Exponential functions for arithmetical semi-groups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {14},
     publisher = {mathdoc},
     volume = {222},
     year = {1966},
     zbl = {0135.11202},
     language = {un},
     url = {https://geodesic-test.mathdoc.fr/item/JRAM_1966__222_150728/}
}