Roger Vickerman is on CollEc

rank value
closeness 3242 4.67625
betweenness 9578 1.04164

co-authors

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