TY - JOUR AU - T. P. Yakovleva TI - Development of a methodology for studying the concept of <>in the elementary course in mathematics JO - Vestnik KRAUNC. Fiziko-matematičeskie nauki PY - 2020 SP - 179 EP - 204 VL - 31 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/VKAM_2020_31_2_a12/ LA - ru ID - VKAM_2020_31_2_a12 ER -