@article{JRAM_1975__276_151616,
     author = {D. Suryanarayana and V. Siva Rama Prasad},
     title = {The number of k-free divisors of an integer. {II.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {200--205},
     publisher = {mathdoc},
     volume = {276},
     year = {1975},
     zbl = {0303.10043},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1975__276_151616/}
}