GULATI, Sanjay. What is GeoGebra?. Voices of Teachers and Teacher Educators, [S. l.], v. 5, n. 1, p. p. 69–72, 2016. Disponível em: http://ejournals.ncert.gov.in/index.php/vtte/article/view/163. Acesso em: 19 aug. 2025.