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@article{PORMA_1963__22_3_114901, author = {Morgado, Jos\'e}, title = {Some remarks on the unitary analogue of the {Nagell} totient function}, journal = {Portugaliae mathematica}, pages = {127--135}, publisher = {mathdoc}, volume = {22}, number = {3}, year = {1963}, zbl = {0122.05206}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1963__22_3_114901/} }
Morgado, José. Some remarks on the unitary analogue of the Nagell totient function. Portugaliae mathematica, Tome 22 (1963) no. 3, pp. 127-135. http://geodesic.mathdoc.fr/item/PORMA_1963__22_3_114901/