The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "deficit" appeared
2020-11-28 : Interview with Le Monde2017-09-04 : Aligning accountability with sovereignty in the European Union: the ECB’s experience
2014-05-15 : EU integration and the road to the euro area
2013-11-15 : The overhaul of the architecture of the euro area and the return of investor confidence