BARBER, S. A Defining Moment in the History of Borders. SFU Educational Review, [S. l.], v. 1, 2007. DOI: 10.21810/sfuer.v1i.327. Disponível em: https://journals.lib.sfu.ca/index.php/sfuer/article/view/327. Acesso em: 8 aug. 2022.