@article{GDZPPN002197456,
title = {The average order of a class of arithmetic functions over arithmetic progressions with applications to quadratic forms.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {316},
year = {1980},
pages = {74-87},
zbl = {0422.10040},
url = {http://dml.mathdoc.fr/item/GDZPPN002197456}
}
Smith, Robert A. The average order of a class of arithmetic functions over arithmetic progressions with applications to quadratic forms.. Journal für die reine und angewandte Mathematik, Tome 316 (1980) pp. 74-87. http://gdmltest.u-ga.fr/item/GDZPPN002197456/