Herzhoff, Tim, and Thomas Teichert. “Leadership Sentiment and Price Fluctuations : Based on the Example of Crude Oil Prices and Sentiment of Oil and Gas CEOs”. Science International Empirical Review 1, no. 2 (June 13, 2021): 1–36. Accessed October 28, 2025. https://mail.sier-journal.com/index.php/SIER/article/view/7.