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@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--19}, publisher = {mathdoc}, volume = {222}, year = {1966}, zbl = {0135.11202}, url = {http://geodesic.mathdoc.fr/item/JRAM_1966__222_150728/} }
E.M. Horadam. Exponential functions for arithmetical semi-groups.. Journal für die reine und angewandte Mathematik, Tome 222 (1966), pp. 14-19. http://geodesic.mathdoc.fr/item/JRAM_1966__222_150728/