The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "assistance" appeared
2018-01-30 : The limits of central bank financing in resolution2017-03-30 : Central bank independence revisited
2016-02-16 : Oral hearing of the Federal Constitutional Court 16 February 2016 in the OMT proceedings
2015-05-07 : Interview with La Vanguardia