Titlebook: Erfolgs- und umweltorientierte Produktionstheorie; Werner Dinkelbach,Otto Rosenberg Textbook 19972nd edition Springer-Verlag Berlin Heidel

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Peter J. Balint,Ronald E. Stewart,Anand Desai,Lawrence C. Waltersrphism. In the present paper we consider triangle-free simply-laced diagrams. Instead of using Goldschmidt’s lemma, we introduce a new approach by applying Bass and Serre’s theory of graphs of groups, not to the amalgams themselves but to a graph of groups consisting of certain automorphism groups.

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