The webapp provides for each item the link on ECB's website.
Speeches for : Jorg Asmussen where "levels" appeared
2013-11-12 : The Costs and Benefits of Unorthodox Monetary Policy2013-04-25 : Saving the euro
2013-04-20 : Eurozone cross-fire: the way out of economic recession - Assessment of a realist and a response to idealists and cynics
2012-10-12 : The Eurozone and Japan: The Way Forward
2012-04-12 : The Irish case from an ECB perspective