GRAHAM-CAMPBELL, James; HENDERSON, Isabel; RITCHIE, Anna; SCOTT, Ian G. A Pictish ‘serpent’ incised slab from Jarlshof, Shetland. Proceedings of the Society of Antiquaries of Scotland, [S. l.], v. 148, p. 189–208, 2019. DOI: 10.9750/PSAS.148.1273. Disponível em: https://journals.socantscot.org/index.php/psas/article/view/10262. Acesso em: 3 may. 2024.