| * Article, ''The Stopp Corona app - Austria as a forerunner in the development of contact tracing apps'', COVID-19 Global Insights Ebook<ref>https://issuu.com/abarriguda/docs/publicar_-_ebook_covid-19-global-insights_</ref> | | * Article, ''The Stopp Corona app - Austria as a forerunner in the development of contact tracing apps'', COVID-19 Global Insights Ebook<ref>https://issuu.com/abarriguda/docs/publicar_-_ebook_covid-19-global-insights_</ref> |
| * Article, ''Data protection and the law enforcement directive: a procrustean bed across Europe?'' ERA Forum 21<ref name=":18">https://rdcu.be/cbCTl</ref> | | * Article, ''Data protection and the law enforcement directive: a procrustean bed across Europe?'' ERA Forum 21<ref name=":18">https://rdcu.be/cbCTl</ref> |
− | * Article, ''PRIVACY ASSESSMENT: Messenger Services - A comparison of Signal, iMessage, Telegram, WhatsApp, Clubhouse, and Facebook Messenge'' ,Hudobnik.at<ref>https://www.hudobnik.at/PA_Messenger%20Services_Matthias%20M.%20Hudobnik.pdf</ref> | + | * Article, ''PRIVACY ASSESSMENT: Messenger Services - A comparison of Signal, iMessage, Telegram, WhatsApp, Clubhouse, and Facebook Messenger'', Hudobnik.at<ref>https://www.hudobnik.at/PA_Messenger%20Services_Matthias%20M.%20Hudobnik.pdf</ref> |