@article{10_1017_S0017089505002752,
     author = {BANKS, WILLIAM D. and LUCA, FLORIAN and SHPARLINSKI, IGOR E.},
     title = {SOME {DIVISIBILITY} {PROPERTIES} {OF} {THE} {EULER} {FUNCTION}},
     journal = {Glasgow mathematical journal},
     pages = {517--528},
     year = {2005},
     volume = {47},
     number = {3},
     doi = {10.1017/S0017089505002752},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002752/}
}