Resume
This work is cataloged in the Scientific Portal. Officially published in Tékhne - Revista de Estudos Politécnicos, http://scielo.pt/pdf/tek/n12/n12a05.pdf (2009). Referenced as: "Teixeira, Cláudia. Corresponding author: Teixeira, Cláudia".
This work is cataloged in the Scientific Portal. Officially published in Tékhne - Revista de Estudos Politécnicos, http://scielo.pt/pdf/tek/n12/n12a05.pdf (2009). Referenced as: "Teixeira, Cláudia. Corresponding author: Teixeira, Cláudia".