Mendes, Francisco, Raquel Moita, Vera Afreixo, Ana Rodrigues, Mariana Carrapatoso, e Nelson Sousa. Study of COVID-19 Surveillance Time Using a Primary Health Care Grouping of Porto Region Dataset. Journal of Statistics on Health Decision 3, no. 1 (Julho 22, 2021): 93-94. Acedido Agosto 21, 2025. https://proa.ua.pt/index.php/jshd/article/view/24922.