TY - JOUR AU - Borislav Lazarov TI - An approach to incorporate dynamic geometry systems in secondary school--model with module JO - The Teaching of Mathematics PY - 2012 SP - 21 VL - XV IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM2_2012_XV_1_a1/ LA - en ID - TM2_2012_XV_1_a1 ER -