RFID Based Indoor Navigation with Obstacle Detection Based on A* Algorithm for the Visually Impaired . International Journal of Information and Electronics Engineering, [S. l.], v. 5, n. 6, p. 428–432, 2015. Disponível em: https://ijiee.org/index.php/ijiee/article/view/458. Acesso em: 20 apr. 2026.