A. Pereira and L. Machado.
" O uso do GeoGebra para construir um círculo trigonométrico", in <em>Proceedings of the 29th Workshop on Computing at School</em>, Passo Fundo/RS, 2023, pp. 288-297, doi: <a href="https://doi.org/10.5753/wie.2023.234428">https://doi.org/10.5753/wie.2023.234428</a>.