CAO, Tianyang. Generation of an Indoor 2D Map and Track Encryption Based on Mobile Crowdsourcing. International Journal of Engineering and Technology, [S. l.], v. 7, n. 3.19, p. 4–19, 2018. DOI: 10.14419/ijet.v7i3.19.16982. Disponível em: https://mail.sciencepubco.com/index.php/IJET/article/view/16982.. Acesso em: 24 may. 2025.