@article{CGTM_2011_4_a18,
     author = {Anna Khmelnitskaya and Dolf Talman},
     title = {Two {Solution} {Concepts} for {TU} {Games} with {Cycle-Free} {Directed} {Cooperation} {Structures}},
     journal = {Contributions to game theory and management},
     pages = {241--265},
     publisher = {mathdoc},
     volume = {4},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CGTM_2011_4_a18/}
}