Details Author(s): Michal OvádekInes Willemyns Publish Date: July 22, 2019 Publication Title: European Journal of International Law Publisher: Oxford University Press Format: Journal Article Volume 30 Issue 2 Page(s) 361-389 Citation(s): Michal Ovádek & Ines Willemyns, International Law of Customs Unions: Conceptual Variety, Legal Ambiguity and Diverse Practice, 30 European Journal of International Law 361 (2019).