Roger Vickerman is on CollEc

rank value
closeness 2340 4.64225
betweenness 9028 1.08242

co-authors

  1. John Peirson [ppe341]
  2. Piet Rietveld [pri130]
  3. Ron Johnston [pjo75]
  4. William Collier [pco148]
  5. Tim Barmby [pba994]
  6. Charles Lindsey [pli342]
  7. Erik Verhoef [pve121]
  8. Stef Proost [ppr114]