The River Ythan Navigation, Aberdeenshire: The only natural inland waterway in northern Scotland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 153, p. 281–297, 2024. DOI: 10.9750/PSAS.153.1402. Disponível em: https://soas-test.journals.ed.ac.uk/index.php/psas/article/view/10799. Acesso em: 1 oct. 2025.