Editors. "Amadeus, Duke of Aosta, elected King of Spain". The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=18587, accessed 09 December 2013.]
Amadeus, Duke of Aosta, younger son of Italian King Vittorio Emmanuel II, is elected as King of Spain following the revolution of 1868 and the ensuing controversy over who should replace Queen Isabella II.