UN High Commissioner for Refugees (UNHCR), Legal considerations on the return of asylum-seekers and refugees from Greece to Turkey as part of the EU-Turkey Cooperation in Tackling the Migration Crisis under the safe third country and first country of asylum concept, 23 March 2016, https://www.refworld.org/policy/legalguidance/unhcr/2016/109567 [accessed 01 May 2026]