The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "secondary" appeared
2018-05-29 : Euro Clearing – the open race2016-04-09 : Scope and Limits of Monetary Policy
2016-02-16 : Oral hearing of the Federal Constitutional Court 16 February 2016 in the OMT proceedings
2014-05-14 : Keynote speech