Roger Vickerman is on CollEc

rank value
closeness 2386 4.64225
betweenness 9226 1.06859

co-authors

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