The webapp provides for each item the link on ECB's website.
Speeches for : Peter Praet where "federal" appeared
2018-11-02 : Interview with BdP Revista, staff magazine of Banco de Portugal2017-11-15 : Communicating the complexity of unconventional monetary policy in EMU
2017-10-27 : EMU - how much federalism?
2016-04-04 : The ECB's fight against low inflation: reasons and consequences
2014-05-15 : Interview with Die Zeit
2014-03-12 : Current issues and challenges for central bank communication
2013-08-06 : Forward guidance and the ECB