LIU, Liu. Indoor Semantic Modelling for Routing: The Two-Level Routing Approach for Indoor Navigation. A+BE | Architecture and the Built Environment, [S. l.], n. 17, p. 1–252, 2017. Disponível em: https://aplusbe.eu/index.php/p/article/view/19. Acesso em: 8 jun. 2025.