@article{bwmeta1.element.bwnjournal-article-apmv4i2p201bwm,
author = {Schinzel, Andrzej and Wang, Y.},
title = {A note on some properties of the functions $\phi$ (n), $\sigma$(n) and $\theta$(n)},
journal = {Annales Polonici Mathematici},
volume = {4},
year = {1958},
pages = {201-213},
zbl = {0081.04203},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-apmv4i2p201bwm}
}
Schinzel, Andrzej; Wang, Y. A note on some properties of the functions φ (n), σ(n) and θ(n). Annales Polonici Mathematici, Tome 4 (1958) pp. 201-213. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-apmv4i2p201bwm/