Karst Conservancy IJS – Home Page (International Journal of Speleology) (in English, Italian, French, German, and Spanish) Caving News (页面存档备份,存于互联网档案馆),
and the Global Neo-Fascist Network. Bloomsbury Publishing. 2016. ISBN 978-1-4725-2250-4. Box, Zira; Saz, Ismael. Spanish Fascism as a Political Religion
(原始内容存档于2019-10-24). SCAN. Someone Else by Abel Azcona in New York. Scan Spanish Contemporary Art Network. September 20, 2014 [January 9, 2020]. (原始内容存档于2019-12-11)
report published by the Spanish Air Ministry October 1971 ASN Accident Description (United Airlines-232). Aviation Safety Network. 19 July 1989 [27 May