TY  - JOUR
AU  - V. I. Voytitsky
TI  - Gifts from Santa Claus or variations on the themes of the classics
JO  - Matematičeskoe obrazovanie
PY  - 2021
SP  - 28
EP  - 37
VL  - 100
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MO_2021_100_4_a5/
LA  - ru
ID  - MO_2021_100_4_a5
ER  -