TY - JOUR TI - P. Nekrasov and Russian secondary school of the end of the XIX cent. Beginning of the XX cent. JO - Matematičeskoe obrazovanie PY - 2015 VL - 75 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MO_2015_75_3_a5/ LA - ru ID - MO_2015_75_3_a5 ER -