HUGHES, R. E.; WERRA, D. H. The source of Late Mesolithic obsidian recovered from Rydno XIII/1959, Central Poland. Archeologia Polski, [S. l.], v. 59, n. 1-2, p. 31–46, 2014. Disponível em: https://journals.iaepan.pl/apol/article/view/454. Acesso em: 22 lis. 2024.