SALAM, A.; KELLING, G. Deposition and paleo-oceanographic significance of the Late Silurian laminated and bioturbated mudstone in the English Lake District, northwest of England. Journal of Himalayan Earth Sciences, [S. l.], v. 26, n. 1, p. 75-86, 1993. Disponível em: http://ojs.uop.edu.pk/jhes/article/view/1445. Acesso em: 4 jan. 2025.