@article{02028911,
title = {Square free values of the order function.},
journal = {The New York Journal of Mathematics [electronic only]},
volume = {9},
year = {2003},
pages = {331-344},
zbl = {1066.11044},
language = {en},
url = {http://dml.mathdoc.fr/item/02028911}
}
Pappalardi, Francesco. Square free values of the order function.. The New York Journal of Mathematics [electronic only], Tome 9 (2003) pp. 331-344. http://gdmltest.u-ga.fr/item/02028911/