Voir la notice de l'article provenant de la source Electronic Library of Mathematics
@article{JIS_2006__9_1_a7, author = {Shparlinski, Igor E.}, title = {On the sum of iterations of the {Euler} function}, journal = {Journal of integer sequences}, publisher = {mathdoc}, volume = {9}, number = {1}, year = {2006}, language = {en}, url = {http://geodesic.mathdoc.fr/item/JIS_2006__9_1_a7/} }
Shparlinski, Igor E. On the sum of iterations of the Euler function. Journal of integer sequences, Tome 9 (2006) no. 1. http://geodesic.mathdoc.fr/item/JIS_2006__9_1_a7/