Costa, Silmery da Silva Brito, et al. “Spatial Analysis of Probable Cases of Dengue Fever, Chikungunya Fever and Zika Virus Infections in Maranhao State, Brazil”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 60, novembro de 2018, p. e62, https://revistas.usp.br/rimtsp/article/view/151762.