Algaba, E.; Bilbao, J. M.; Borm, P.; López, J. J. - In: Mathematical Methods of Operations Research 54 (2001) 3, pp. 359-371
We study cooperation structures with the following property: Given any two feasible coalitions with non-empty intersection, its union is a feasible coalition again. These combinatorial structures have a direct relationship with graph communication situations and conference structures à la...
