The Smart city vision: The internet-of-postal-things (iopt) approach. Smart Cities and Regional Development (SCRD) Journal, [S. l.], v. 2, n. 1, p. 57–69, 2018. DOI: 10.25019/scrd.v2i1.28. Disponível em: https://scrd.eu/index.php/scrd/article/view/28.. Acesso em: 6 may. 2024.