The webapp provides for each item the link on ECB's website.
Speeches for : Vitor Constancio where "credibility" appeared
2012-06-04 : Opening remarks at the third conference on accounting, financial reporting and corporate governance for central banks2011-09-22 : Laudatio for Professor Kenneth Rogoff, recipient of the 2011 Deutsche Bank Prize in Financial Economics
2011-05-05 : Introductory statement to the press conference (with Q&A)