Gonçalves, F.P. and Marques, C.A. 2013. The problematization of experimental activities in teaching and in training for Chemistry teacher trainers. Enseñanza de las Ciencias. Revista de investigación y experiencias didácticas. 31, 3 (Nov. 2013), 67–86. DOI:https://doi.org/10.5565/rev/ec/v31n3.681.