1. Derks JJM, and Gilles RP (1992) ?Hierarchical organization structures and constraints in coalition formation?, Working paper, Department of Economics, VPI & SU, Blacksburg.
2. Dragan I (1992) ?Multiweighted Shapley values and random order values?, Technical Report 286, Department of Mathematics, University of Texas at Arlington.
3. Faigle U, and Kern W (1992) ?The Shapley value for cooperative games under precedence constraints?, Memorandum 1025, Faculty of Applied Mathematics, University of Twente, The Netherlands.
4. Gilles RP, and Owen G (1991) ?Games with permission structures: the disjunctive approach?, Working Paper, Department of Economics, VPI & SU, Blacksburg.
5. Gilles RP, Owen G, and van den Brink R (1992) ?Games with permission structures: the conjunctive approach?,International Journal of Game Theory, 20, 277?293.