TY - JOUR TI - 25 years and 100 issues of the third series of the journal ``Mathematical education'' JO - Matematičeskoe obrazovanie PY - 2021 SP - 2 VL - 100 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MO_2021_100_4_a0/ LA - ru ID - MO_2021_100_4_a0 ER -