References (if you’re interested)
The original paper I wrote regarding these ideas is at:
http://www.cs.ukc.ac.uk/people/staff/saf/saf/seda-papers/sally.html
I gave a presentation at the Links’98 conference around these ideas. The slides are at:
http://www.cs.ukc.ac.uk/people/staff/saf/networks/links3-with-notes/index.htm
and I would recommend downloading the whole presentation, as there is some explanatory text in the “notes” section.