AL-AHDAL, LUAI. Indoor Navigation System Guide for Visual Impaired Community. PERINTIS eJournal, [S. l.], v. 13, n. 2, p. 19–30, 2023. DOI: 10.5281/zenodo.15875850. Disponível em: https://perintis.org.my/ejournalperintis/index.php/PeJ/article/view/155. Acesso em: 3 oct. 2025.