MACGREGOR, Arthur. Two antler crossbow nuts and some notes on the early development of the crossbow. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 107, p. 317–321, 1978. DOI: 10.9750/PSAS.107.317.321. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/8950. Acesso em: 2 may. 2024.