@Article{Thomas14,
  author = 	 {Paul Thomas},
  title = 	 {Using interaction data to explain difficulty navigating online},
  journal = 	 {ACM Transactions on the Web},
  year = 	 2014,
  volume =       {8},
  number =       {4},
  note =         {Article 24.  \url{http://es.csiro.au/pubs/thomas_tweb14.pdf}}
}