@phdthesis{wright07characterising,
   title = {Characterising Anonymity Systems},
   author = {Joss Wright},
   school = {Department of Computer Science, University of York, York},
   year = {2007},
   month = {November},
   www_pdf_url = {http://www.pseudonymity.net/~joss/doc/papers/2007/wright07characterising.pdf}
}