TY  - JOUR
AU  - A. S. Semchankau
TI  - On Differences of Multiplicative Functions and Solutions of the Equation $n-\varphi(n)=c$
JO  - Matematičeskie zametki
PY  - 2021
SP  - 608
EP  - 615
VL  - 109
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2021_109_4_a11/
LA  - ru
ID  - MZM_2021_109_4_a11
ER  -