@Article{puolamaki2009vakdsi,
  author = 	 {Kai Puolam\"aki and Alessio Bertone},
  title = 	 {Introduction to the Special Issue on Visual Analytics and Knowledge Discovery},
  journal = 	 {SIGKDD Explorations},
  year = 	 2009,
  volume = 	 11,
  number = 	 2,
  pages = 	 {3--4},
  month = 	 {December},
}