VALENTINA POP: Italian appointed head of EU's anti-fraud office. In: EUobserver.com. 14. Dezember 2010, abgerufen am 15. Dezember 2010 (englisch): „According to his CV, Mr Kessler is fluent in both English and German as well as his native Italian.“
euractiv.com
EPP gets another top job: Finland’s Itala to head OLAF. In: euractiv.com. 21. Juni 2018 (englisch, euractiv.com [abgerufen am 18. Juli 2018]).