IEEE 802.11 as a passive sensor for crowd density counting in closed areas. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 3, p. 662–671, 2021. DOI: 10.21533/pen.v9.i3.880. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/880. Acesso em: 13 jun. 2026.