Quintas S, Ferreira RA, Oliveira H. The teaching of measures of variability at secondary level: Examining two teachers' PCK. In: International conference Turning Data into Knowledge: New Opportunities for Statistics Education. Lisboa, Portugal: Instituto de Educação da Universidade de Lisboa; 2015. 1. p. 130-131p. Edit

Quintas S, Ferreira RA, Oliveira H. Attending to students' thinking on bivariate statistical data at secondary level: two teachers' pedagogical content knowledge. In: ICOTS 9: International conference on teaching statistics. USA, Flagstaff, AZ: International Statistical institute; 2014. Edit

Quintas S, Ferreira RA, Oliveira H. O conhecimento didático de Estatística de duas professoras de Matemática sobre dados bivariados. Bolema. 2015;29(51):284-306.Edit