The webapp provides for each item the link on ECB's website.
Speeches for : Mario Draghi where "summa" appeared
2015-03-31 : Accounts and accountability2014-08-04 : Central bank communication
2013-06-13 : Responsible leadership in times of crisis
2012-10-13 : Text of the video message given at the award ceremony for the second Luca Pacioli Award