1. Case C-6/64 Costa v. ENEL [1964] ECR I-00585
2. Case C-11/70 International Handelsgesellschaft [1970] ECR I- 01125
3. Case C-28/12 Commission v Council [2015]
4. Case C-29/69 Stauder v City of Ulm [1969] ECR I-00419
5. Case C-181/73 R. & V. Haegeman v Belgian State [1974] ECR 1974 – 00449