Merton, Robert C. “On the Role of the Wiener Process in Finance Theory and Practice: The Case of Replicating Portfolios.” In The Legacy of Norbert Wiener: A Centennial Symposium. Vol. 60, edited by D. Jerison, I. M. Singer and D. W. Stroock. PSPM Series. Providence, R.I.: American Mathematical Society, 1997.