Ibiapina Ferreira Costa, S. “Reasons for a Medicine for Needy Populations: DOI: 10.15343/0104-7809.200731.2.7”. O Mundo Da Saúde, vol. 31, no. 2, Apr. 2007, pp. 196-01, https://revistamundodasaude.emnuvens.com.br/mundodasaude/article/view/895.