The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "journal" appeared
2020-01-27 : Asset price inflation and monetary policy2019-03-27 : Necessity, proportionality and probity – central bank independence in unconventional times
2018-09-06 : Financial stability and the ECB
2017-10-09 : Economic Policy and the Need for Humility