diff --git a/schemas/covid_eu_schema.md b/schemas/covid_eu_schema.md
index a0eae18..ed62a17 100644
--- a/schemas/covid_eu_schema.md
+++ b/schemas/covid_eu_schema.md
@@ -16,4 +16,6 @@
 
 ## Source
 
-* https://ec.europa.eu/health/sites/default/files/ehealth/docs/vaccination-proof_interoperability-guidelines_en.pdf
\ No newline at end of file
+* https://ec.europa.eu/health/sites/default/files/ehealth/docs/vaccination-proof_interoperability-guidelines_en.pdf
+* https://ec.europa.eu/info/live-work-travel-eu/coronavirus-response/safe-covid-19-vaccines-europeans/eu-digital-covid-certificate_en 
+* https://www.consilium.europa.eu/en/policies/coronavirus/eu-digital-covid-certificate/ 
\ No newline at end of file