Arrais, Margarete, et al. “Sensitisation to Aeroallergens in Relation to Asthma and Other Allergic Diseases in Angolan Children: A Cross-Sectional Study”. Allergologia Et Immunopathologia, vol. 48, no. 3, May 2020, pp. 281-9, https://all-imm.com/index.php/aei/article/view/221.