@article{81060,
      author       = "Friedman, Sy D.  and Centre de Recerca Matemàtica ",
      title        = "<a
                      href="/search?f=title&p=Equivalence%20relations%20in%20set%20theory%2C%20computation%20theory%2C%20model%20theory%20and%20complexity%20theory&sc=1&ln=en">Equivalence
                      relations in set theory, computation theory, model theory
                      and complexity theory</a>",
      year         = "2011",
}