Deletion of Pieter Ballon

Comment: Seems to meet 
Stance: keep
Cited policy: Wikipedia:Notability (WP:NPROF)

Comment: no clear indication of  if he is truly an "expert" on smart cities there should be some international coverage to support this. However, citations are decent in a low-citation field with 8 papers with 100+ citations so according to  I think he would pass the bar
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG||WP:NPROF)

Comment: For passing #6 and having 4k plus citations in Google Scholar
Stance: keep
Cited policy: Wikipedia:Notability (WP:NACADEMIC)