ABAFOR: A Blockchain-based Privacy-Preserving Architecture for Efficient Contact Tracing and GIS Analysis. European Journal of Electrical Engineering and Computer Science, [S. l.], v. 6, n. 2, p. 88–102, 2022. DOI: 10.24018/ejece.2022.6.2.434. Disponível em: https://ejece.org/index.php/ejece/article/view/434. Acesso em: 21 oct. 2025.