Nós, R.L. y Lago, R.C. 2020. Investigando teoremas de geometria plana com o GeoGebra <br> Investigating plane geometry theorems with GeoGebra. Revista do Instituto GeoGebra Internacional de São Paulo. ISSN 2237-9657. 9, 3 (dic. 2020), 15–29. DOI:https://doi.org/10.23925/2237-9657.2020.v9i3p015-029.