Nasios, Georgios, und Niki Foradoula. „Public-Private Partnerships (PPPs): Potential Impacts and Critical Success Factors“. HAPSc Policy Briefs Series 2, no. 2 (Dezember 29, 2021): 65–73. Zugegriffen Oktober 26, 2025. https://ejournals.epublishing.ekt.gr/index.php/hapscpbs/article/view/29519.