Europe Rethinks the Schengen Agreement
Schengen Area - List of the 26 Schengen Countries
Entry Exit System EES system (EU borders in 2022)
Schengen at risk, border controls in six countries - InfoMigrants
Why the Schengen agreement might be under threat | The Economist
Border checks in EU challenge Schengen Agreement – DW – 11/12/2019
EU facts behind the claims: borders - Full Fact
Europe had a dream of a land without borders. Now that dream may be turning to dust. - The Washington Post
Map of Border Controls Inside Europe's Schengen Area: August 2016 - Political Geography Now
6 Schengen Area Countries Have Now Extended Their Border Controls for Another Half-Year - SchengenVisaInfo.com
Free movement and border policies in Africa and Europe
Schengen: Controversial EU free movement deal explained - BBC News
The Union's external borders: a European debate revisited
The Future of Schengen – European Council on Foreign Relations
EXPLAINED: Which Schengen area countries have border controls in place and why? - The Local
The slow death of Schengen – EURACTIV.com
Border fences and internal border controls in Europe (March 2017) - World | ReliefWeb
The Schengen crisis: a failure - The New Federalist
Visa Waiver Eligible Travelers Going To Europe & Schengen Countries Will Require ETIAS Electronic Travel Authorization From 2021 - LoyaltyLobby
Strengthening the EU's external borders - Consilium
Schengen Area - Wikipedia
EU internal borders may be reimposed for two years
Entry/Exit System (EES) - Schengen Area Border Control
