1. Digraphs: Theory, Algorithms and Applications;Bang-Jensen,2008
2. Nouvelles extensions du noyau dun graphe et ses applications et theorie des jeux;Berge;Publ. Econometriques,1977
3. Minimax theorems for normal hypergraphs and balanced hypergraphs-a survey;Berge;Ann. Discrete Math.,1984
4. Perfect graphs, kernels, and cores of cooperative games;Boros;Discrete Math.,2006
5. At least three minimal quasi-kernels;Bowser;Discrete Appl. Math.,2012