1. Black, F. & Scholes, M. J. Polit. Econ. 81, 637–654 (1973).
2. Merton, R. C. Bell J. Econ. Mgmt Sci. 4, 141–183 (1973).
3. Merton, R. C. Appendix to Samuelson, P. A. SIAM Rev. 15, 34–38 (1973).
4. Sprenkle, C. M. Yale Econ. Essays 1, 178–231 (1961).
5. Samuelson, P. A. Ind. Mgmt Rev. 6, 41–49 (1965).