@article{GDZPPN002188570,
title = {The number of k-free and k-ary divisors of m which are prime to n.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {258},
year = {1973},
pages = {56-75},
zbl = {0266.10039},
url = {http://dml.mathdoc.fr/item/GDZPPN002188570}
}
Suryanarayana, D.; Pradas, V. Siva Rama. The number of k-free and k-ary divisors of m which are prime to n.. Journal für die reine und angewandte Mathematik, Tome 258 (1973) pp. 56-75. http://gdmltest.u-ga.fr/item/GDZPPN002188570/