Ramanujan's Sum and Nagell's Totient Functio for Arithmetical Semi-Groups.
Horadam, E.M.
Mathematica Scandinavica, Tome 22 (1968), p. 269-281 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1968-01-01
EUDML-ID : urn:eudml:doc:166051 
@article{GDZPPN002349493,
     title = {Ramanujan's Sum and Nagell's Totient Functio for Arithmetical Semi-Groups.},
     journal = {Mathematica Scandinavica},
     volume = {22},
     year = {1968},
     pages = {269-281},
     zbl = {0182.37601},
     url = {http://dml.mathdoc.fr/item/GDZPPN002349493}
}

Horadam, E.M. Ramanujan's Sum and Nagell's Totient Functio for Arithmetical Semi-Groups.. Mathematica Scandinavica, Tome 22 (1968) pp. 269-281. http://gdmltest.u-ga.fr/item/GDZPPN002349493/