1. Bulgaria’s Ostpolitik and the Eastern Partnership
2. What is Hidden Behind EU’s Development Policy?
3. The Circular Economy as a System
4. Graphical representation of the Circular Economy
5. Supranational hybrid materialism: Two strategies for own resources of the European Union after 2020.
6. EU Foreign Policy – Ground Evidence from MENA
6. Comparative Regional Integration
7. Concentric Integration Cycles
8. Essential Sustainability Reader