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@article{JIS_2010__13_4_a7, author = {Zhang, Deyu and Zhai, Wenguang}, title = {Mean values of a gcd-sum function over regular integers modulo $n$}, journal = {Journal of integer sequences}, publisher = {mathdoc}, volume = {13}, number = {4}, year = {2010}, language = {en}, url = {http://geodesic.mathdoc.fr/item/JIS_2010__13_4_a7/} }
Zhang, Deyu; Zhai, Wenguang. Mean values of a gcd-sum function over regular integers modulo $n$. Journal of integer sequences, Tome 13 (2010) no. 4. http://geodesic.mathdoc.fr/item/JIS_2010__13_4_a7/