POLLEXFEN, John H; SIM, George. Notice of Coins of David I. of Scotland, and Henry I. of England, found, with Gold Ornaments, &c., at Plan, in the Island of Bute, in June 1863. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 5, p. 372–384, 1865. DOI: 10.9750/PSAS.005.372.384. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/5154. Acesso em: 26 apr. 2024.