1. Driessen TSH (1984) Cores ofk-convexn-person games. Report 8433. Department of Mathematics, Catholic University, Nijmegen, The Netherlands
2. Driessen TSH (1985) Properties of 1-convexn-person games. Operations Research Spektrum 7:19–26
3. Driessen TSH, Tijs SH (1982) Semiconvex games and theτ-value. Report 8228. Department of Mathematics, Catholic University, Nijmegen, The Netherlands (To appear in International Journal of Game Theory)
4. Driessen TSH, Tijs SH (1983) Theτ-value, the nucleolus and the core for a subclass of games. Methods of Operations Research 46:395–406
5. Driessen, TSH, Tijs SH (1984) Extensions and modifications of theτ-value for cooperative games. In: Hammer G, Pallaschke D Selected topics in operations research and mathematical economics. (ed) Springer-Verlag, Berlin, pp 252–261