The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "summer" appeared
2019-03-27 : Necessity, proportionality and probity – central bank independence in unconventional times2017-12-29 : Interview with Börsen-Zeitung
2015-10-14 : The future of Europe's financial market infrastructure: the Eurosystem's Vision 2020
2015-10-13 : Speech at MNI Connect event
2014-05-14 : Keynote speech