@article{JIS_2015__18_2_a2,
     author = {Defant,  Colin},
     title = {On arithmetic functions related to iterates of the {Schemmel} totient functions},
     journal = {Journal of integer sequences},
     year = {2015},
     volume = {18},
     number = {2},
     zbl = {1316.11007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JIS_2015__18_2_a2/}
}