Johnsen, Erik. 1964. “C. Jackson Grayson, Jr., Decisions Under Uncertainty Drilling Decisions by Oil and Gas Operators, Harvard Business School, Boston, 1960, 402 s., Dollars”. Ledelse Og Erhvervsøkonomi 28 (januar). https://tidsskrift.dk/ledelseogerhvervsoekonomi/article/view/34191.