Roger Perman is on CollEc

rank value
closeness 13493 5.0746
betweenness 10375 0.946129

co-authors

  1. David Stern [pst75]
  2. Joseph Byrne [pby6]
  3. P B Anand [pan205]
  4. John Swales [psw28]
  5. Peter McGregor [pmc127]