TY - JOUR AU - S. Radovic TI - An Innovative Approach in Teaching; Mathematics in Elementary and High Schools by Using the Software Package GeoGebra JO - Mathematica balkanica PY - 2011 SP - 527 VL - 25 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MABA_2011_25_5_a8/ ID - MABA_2011_25_5_a8 ER -