The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "attractive" appeared
2020-05-11 : An ECB digital currency – a flight of fancy?2017-01-16 : Digital Base Money: an assessment from the ECB's perspective
2016-11-17 : The causes of monetary policy measures and their impact - a review
2014-01-13 : “Europe after the warm reboot”