The webapp provides for each item the link on ECB's website.
Speeches for : Lorenzo Bini Smaghi where "purchases" appeared
2011-09-15 : Policy rules and institutions in times of crisis2010-10-08 : From Convoy to Parting Ways? Post Crisis Divergence Between European and US Macroeconomic Policies
2009-11-19 : Monetary policy in challenging times
2009-04-28 : Conventional and unconventional monetary policy