@article{JIS_2016__19_5_a1,
     author = {Alekseyev, Max A.},
     title = {Computing the inverses, their power sums, and extrema for {Euler's} totient and other multiplicative functions},
     journal = {Journal of integer sequences},
     publisher = {mathdoc},
     volume = {19},
     number = {5},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2016__19_5_a1/}
}