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    • Pseudo 2-factor isomorphic regular bipartite graphs 

      ABREU, M; DIWAN, AJIT A; JACKSON, BILL; LABBATE, D; SHEEHAN, J (Elsevier, 2008)
      A graph G is pseudo 2-factor isomorphic if the parity of the number of circuits in a 2-factor is the same for all 2-factors of G. We prove that there exist no pseudo 2-factor isomorphic k-regular bipartite graphs for k⩾4. ...