@article{GDZPPN002480425, title = {Density Functions for Prime and Relatively Prime Numbers.}, journal = {Monatshefte f\"ur Mathematik}, volume = {84}, year = {1977}, pages = {99-112}, zbl = {0355.10034}, url = {http://dml.mathdoc.fr/item/GDZPPN002480425} }
Erdös, Paul; Richards, Ian. Density Functions for Prime and Relatively Prime Numbers.. Monatshefte für Mathematik, Tome 84 (1977) pp. 99-112. http://gdmltest.u-ga.fr/item/GDZPPN002480425/