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Sheaves on graphs, their homological invariants, and a proof of the Hanna Neumann conjecture
Joel Friedman ; with an appendix by Warre...
Bok Engelsk 2015
Groups acting on graphs
Warren Dicks, M. J. Dunwoody
Bok Engelsk 1989
Groups, trees and projective modules
Warren Dicks
Bok Språk ikke angitt 1980