@article{10_4064_cm6910_3_2017,
     author = {Florian Luca and Min Sha and Igor E. Shparlinski},
     title = {On two functions arising in the study of the {Euler} and {Carmichael} quotients},
     journal = {Colloquium Mathematicum},
     pages = {179--192},
     publisher = {mathdoc},
     volume = {149},
     number = {2},
     year = {2017},
     doi = {10.4064/cm6910-3-2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm6910-3-2017/}
}