@article{JRAM_1977__295_151916,
     author = {D. Suryanarayana},
     title = {The divisor problem for (k, r)-integers. {II.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {49--56},
     year = {1977},
     volume = {295},
     zbl = {0364.10021},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1977__295_151916/}
}