The webapp provides for each item the link on ECB's website.
Speeches for : Lorenzo Bini Smaghi where "conventional" appeared
2011-01-27 : The challenges facing monetary policy2011-01-19 : Lessons for monetary policy from the recent crisis
2010-10-08 : From Convoy to Parting Ways? Post Crisis Divergence Between European and US Macroeconomic Policies
2009-04-28 : Conventional and unconventional monetary policy