@article{378185,
      author = {Ocampo, Hernan. and Paycha, Sylvie. and Reyes, Andrés.},
      url = {http://library.usi.edu/record/378185},
      title = {Geometric methods for quantum field theory proceedings of  the summer school : Villa de Leyva, Colombia, 12-30 July  1999 / [electronic resource] :},
      publisher = {World Scientific,},
      recid = {378185},
      pages = {vii, 520 p. :},
      address = {Singapore ;},
      year = {2001},
}