Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts
@article{PIM_1989_N_S_46_60_a8, author = {Piotr Zarzycki}, title = {A {Remark} on a {Certain} {Class} of {Arithmetic} {Functions}}, journal = {Publications de l'Institut Math\'ematique}, pages = {55 }, publisher = {mathdoc}, volume = {_N_S_46}, number = {60}, year = {1989}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PIM_1989_N_S_46_60_a8/} }
Piotr Zarzycki. A Remark on a Certain Class of Arithmetic Functions. Publications de l'Institut Mathématique, _N_S_46 (1989) no. 60, p. 55 . http://geodesic.mathdoc.fr/item/PIM_1989_N_S_46_60_a8/