@article{Gallicchio2013a,
  author = "C. Gallicchio and A. Micheli",
  title = "Tree Echo State Networks",
  year = 2013,
  journal = "Neurocomputing",
  volume = 101,
  pages = "319-337",
  doi = "10.1016/j.neucom.2012.08.017",
  url = "http://www.sciencedirect.com/science/article/pii/S0925231212006571"
}