João C. Duarte, Filipe M. Rosas, Pedro Terrinha, Wouter P. Schellart, David Boutelier, Marc-André Gutscher, António Ribeiro: Are subduction zonesinvading the Atlantic? Evidence from the southwest Iberia margin.doi:10.1130/G34100.1
Noel Riley Fitch, Andrew Midgley: The Grand Literary Cafes of Europe. New Holland, 2006, ISBN 1-84537-114-3, S.114ff. (eingeschränkte Vorschau in der Google-Buchsuche).
ine.pt
www.ine.pt – Indikator Resident population by Place of residence and Sex; Decennial in der Datenbank des Instituto Nacional de Estatística