TY  - JOUR
AU  - V. Drozdov
TI  - What did our grandfathers solved in the old time
JO  - Matematičeskoe obrazovanie
PY  - 2014
SP  - 19
EP  - 33
VL  - 71
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MO_2014_71_3_a1/
LA  - ru
ID  - MO_2014_71_3_a1
ER  -