Combinatorics 79, Part I

Combinatorics 79, Part II

Algebraic and combinatorial methods in operations research proceedings of the Workshop on Algebraic Structures in Operations Research

Trees and hills methodology for maximizing functions of systems of linear relations

Orders--description and roles in set theory, lattices, ordered groups, topology, theory of models and relations, combinatorics, effectiveness, social sciences : proceedings of the Conference on Ordered Sets and Their Applications, Château de la Tourette, l'Arbresle, July 5-11, 1982 = Ordres--description et rôles : en théorie des ensembles, des treillis, des groupes ordonnés en topologie, théorie des modèles et des relations, combinatoire, effectivité, sciences sociales : actes de la Conférence sur les ensembles ordonnés et leur applications, Château de la tourette, l'Arbresle, juillet 5-11, 1982

Convexity and graph theory proceedings of the Conference on Convexity and Graph Theory, Israel, March 1981

Topics on perfect graphs