1. Optimale Tests bei Intervallwahrscheinlichkeit (Vandenhoeck & Ruprecht, Göttingen, 1998) (In German, with an English summary on pp. 247-249).
2. On decision making under ambiguous prior and sampling information, in: ISIPTA'01: Proceedings of the Second International Symposium on Imprecise Probabilities and their Applications, Cornell University, Ithaca (N.Y.), 2001, edited by G. de Cooman, T. Fine, S. Moral, and T. Seidenfeld (Shaker, Maastricht, 2001), pp. 9-16.
3. Neyman–Pearson testing under interval probability by globally least favorable pairs
4. Expected utility within a generalized concept of probability — a comprehensive framework for decision making under ambiguity
5. On the suboptimality of the Generalized Bayes Rule and robust Bayesian procedures from the decision theoretic point of view - a cautionary note on updating imprecise prio, in: ISIPTA'03: Proceedings of the Third International Symposium on Imprecise Probabilities and their Applications, Lugano, 2003, edited by J. M. Bernard, T. Seidenfeld, and M. Zaffalon (Carleton Scientific, Waterloo 2003), pp. 31-45.