TY  - JOUR
AU  - E. I. Znak
TI  - Operators of the type $Af(x)=f(aх+b)-\lambda f(x)$ and functional equations in problems of math competitions
JO  - Matematičeskoe obrazovanie
PY  - 2017
SP  - 33
EP  - 39
VL  - 81
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MO_2017_81_1_a4/
LA  - ru
ID  - MO_2017_81_1_a4
ER  -