Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{EUG_1996__45_a10, author = {Laurentiu Panaitopol}, title = {On some {Properties} {Concerning} the {Function} \ensuremath{\alpha}(n)=n-\ensuremath{\varphi}(n)}, journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma} }, pages = {71-77}, publisher = {mathdoc}, volume = {45}, year = {1996}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/EUG_1996__45_a10/} }
Laurentiu Panaitopol. On some Properties Concerning the Function α(n)=n-φ(n). Ευκλείδης Γ , Tome 45 (1996), p. 71-77. http://geodesic.mathdoc.fr/item/EUG_1996__45_a10/