Just noticed that two of my articles have recently passed the 100 citation 'milestone' according to Google Scholar. It is also pleasing that my co-authored book, Mapping Cyberspace, from 2000, is still picking up cites and now has surpassed the 500 mark.

• "The potential of web-based mapping and virtual reality technologies for modelling urban environments", Computers, Environment and Urban Systems (1998) has 108 citations.
  
• "Flying through code/space: the real virtuality of air travel", Environment and Planning A (2004) has some 105 citations.

Obviously you have to take Google Scholar's citation counts with a serious pinch of salt as they are often significantly inflated with double-counting, self-citations and random cites from draft documents and working papers. The much stricter (and more narrowly measured) citations from the ISI Web of Science database gives "Flying through code/space" a less impressive 59 citations (as 'mapped' below) and only a measly 140 odd cites for Mapping Cyberspace.