NIELSEN, T. S.; HOVGESEN, H. H. GPS in Travel and Activity Surveys. Proceedings from the Annual Transport Conference at Aalborg University, [S. l.], v. 11, n. 1, 2004. DOI: 10.5278/ojs.td.v11i1.4989. Disponível em: https://journals.aau.dk/index.php/td/article/view/4989. Acesso em: 5 may. 2024.