Buhanist, Peter. “Path Dependency in the Energy Industry: The Case of Long-Term Oil-Indexed Gas Import Contracts in Continental Europe”. International Journal of Energy Economics and Policy 5, no. 4 (October 14, 2015): 934–948. Accessed May 5, 2024. https://www.econjournals.com/index.php/ijeep/article/view/1298.