Prof. Dr.-Ing. Klaus Richter, and Jonas Baumann. “From Vision to Verdict: A Longitudinal Analysis of Cost Escalation and Risk Management in the Stuttgart 21 Megaproject”. International Journal of Economics Finance & Management Science 10, no. 09 (September 1, 2025): 1–13. Accessed September 15, 2025. https://scientiamreearch.org/index.php/ijefms/article/view/171.