Resume
This work is cataloged in the Scientific Portal. Officially published in Gazeta de Matemática (2016). Referenced as: "Eliana Costa e Silva; Cristina Lopes; Aldina Correia".
This work is cataloged in the Scientific Portal. Officially published in Gazeta de Matemática (2016). Referenced as: "Eliana Costa e Silva; Cristina Lopes; Aldina Correia".