@article{Abrego:130848,
      author        = "Abrego, J. and Sanchez, J. L. and Arauzo, J. and Fonts, I.
                       and Gil-Lalaguna, N. and Atienza-Martinez, M.",
      title         = "{Technical and energetic assessment of a three-stage
                       thermochemical treatment for sewage sludge}",
      year          = "2013",
}