The webapp provides for each item the link on ECB's website.
Speeches for : Yves Mersch where "effectiveness" appeared
2020-01-27 : Asset price inflation and monetary policy2018-11-22 : Europe: a work in progress – political integration and economic convergence in Monetary Union
2018-03-19 : Challenges facing monetary policy in the euro area
2015-12-29 : Interview with International Bankers Forum
2015-06-25 : On European Unity: Economic and Institutional Challenges Facing Europe
2013-11-26 : Economic and legal limits of central banking