The webapp provides for each item the link on ECB's website.
Speeches for : Fabio Panetta where "fee" appeared
2023-04-24 : A digital euro: widely available and easy to use2023-01-23 : The digital euro: our money wherever, whenever we need it
2021-02-09 : Interview with Der Spiegel
2020-12-02 : Money in the digital era