1. G. B. Di Masi, W. J. Runggaldier, On measure transformations for combined filtering and parameter estimation in discrete time, Systems & Control Letters 2 (1982), 57–62.
2. H. Föllmer, M. Schweizer, Hedging of contingent claims under incomplete information, In: Applied Stochastic Analysis, Stochastic Monographs (M. H. A. Davis and R. J. Elliott, eds.), vol. 5, Gordon & Breach, London/New York, 1991, pp. 389–414.
3. H. Föllmer, D. Sondermann, Hedging of non-redundant contingent claims, In: Contributions to Mathematical Economics (W. Hildenbrand and A. Mas-Colell, eds. ), 1986, pp. 205–223.
4. D. Galai, Inferring volatility from option prices, Finance 12 (1991).
5. J. M. Harrison, D. M. Kreps, Martingales and arbitrage in multiperiod securities markets, J. of Economic Theory 20 (1979), 381–408.