ANDREWS, Michael C. The Boundary between Scotland and England in the Portolan Charts. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 60, p. 36–66, 1926. DOI: 10.9750/PSAS.060.36.66. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/7660. Acesso em: 13 jul. 2024.