The webapp provides for each item the link on ECB's website.
Speeches for : Otmar Issing where "ideas" appeared
2005-11-06 : Mario Monti. A tribute.2002-07-05 : Some reflections on handling monetary policy in a global environment
1999-09-20 : Europe: common money - political union?
1999-06-17 : The ECB and its watchers