@article{JRAM_1972__254_151219,
     author = {John Knopfmacher},
     title = {Arithmetical properties of finite rings and algebras, and analytic number theory. {II.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {74--99},
     publisher = {mathdoc},
     volume = {254},
     year = {1972},
     zbl = {0246.10033},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1972__254_151219/}
}