N-dimensional distribution reduction preserving its structure

@InProceedings\{VTB2006,
  author       = "Eduard V\'azquez and Francesc Tous and Ramon Baldrich and Maria Vanrell",
  title        = "N-dimensional distribution reduction preserving its structure ",
  booktitle    = "Artificial Intelligence Research and Development (ACIA'06)",
  series       = "Frontiers in Artificial Intelligence and Applications",
  volume       = "146",
  pages        = "167--175",
  month        = "Oct",
  year         = "2006",
  publisher    = "IOS Press",
  address      = "Perpignan (France)",
  url          = "http://www.cat.uab.cat/Public/Publications/2006/VTB2006"
}