Carlos Closa (2016). Secession from a Member State and EU Membership: the View from the Union. European Constitutional Law Review, 12, pp 240-264. doi:10.1017/S1574019616000146.

Abstract: Arguments in favour of a more explicit and clearer EU stance on secession from a member state – two different cases for secession and their implications – the inadmissibility of unilateral secession within the EU – consensual secession does not create a legal entitlement for automatic membership – the need to follow the route of Article 49 TEU – no need for a specific secession provision in EU treaties