The webapp provides for each item the link on ECB's website.
Speeches for : Benoit Coure where "cashless" appeared
2018-03-13 : Bitcoin not the answer to a cashless society2013-10-21 : Retail payments at a crossroads
2013-04-22 : Euro banknotes: a secure means of payment and a symbol of Europe
2013-04-15 : Harmonising cashless payments: the SEPA experience