Rocha, Suzy, Aquino, Caroline, Mendes, Cláudia, Santos, Míria, Fernandes, Ana, Moreira, Camila, Oliveira, Rosy, Benevides, Jordana, Barreto, Ana, AND Barbosa, Rebeca. " Evidence for the Cancer Patients’ Pain Management: an Integrative Review" International Archives of Medicine [Online], Volume 9(24 October 2016)