
http://library.fes.de/pdf-files/bueros/athen/13572.pdf

https://www.brookings.edu/blog/up-front/2020/05/15/developing-policies-for-effective-covid-19-containment-the-trace-model/?utm_campaign=BrookingsBrief&utm_source=hs_email&utm_medium=email&utm_content=88024714

https://ec.europa.eu/epsc/sites/epsc/files/epsc_brief_passerelles_2.pdf?utm_source=POLITICO.EU&utm_campaign=042aa4f2be-EMAIL_CAMPAIGN_2019_01_16_02_43&utm_medium=email&utm_term=0_10959edeb5-042aa4f2be-190380769