The webapp provides for each item the link on ECB's website.
Speeches for : Peter Praet where "sufficiently" appeared
2018-01-29 : Maintaining price stability with unconventional monetary policy2017-09-16 : Interview with De Tijd
2014-11-17 : Repairing the bank lending channel: the next steps
2013-01-29 : Speech on the occasion of the “Annual Danish Top Executive Summit 2013”