Hack-Handa, József, Zoltán Veres, and Éva Nádor. “Secrets of Successful Project Relationships: Perceived Project Competencies of Sellers and Buyers”. The Hungarian Journal of Marketing and Management 46, no. 3 (October 3, 2019): 55–63. Accessed September 3, 2026. https://journals.lib.pte.hu/index.php/mm/article/view/387.