https://dgap.org/de/forschung/publikationen/europa-braucht-eine-bessere-geooekonomische-strategie
https://www.politico.eu/article/serbia-far-right-vladimir-putin-war-ukraine-kosovo/?utm_source=POLITICO.EU&utm_campaign=e891de40f9-EMAIL_CAMPAIGN_2023_03_16_04_17&utm_medium=email&utm_term=0_10959edeb5-e891de40f9-%5BLIST_EMAIL_ID%5D
https://www.lobbycontrol.de/wp-content/uploads/gaslobby-studie-lobbycontrol.pdf
https://www.brookings.edu/articles/whats-at-stake-for-china-in-the-wagner-rebellion/