Hi Calin, included here is a paper I wrote Jakob Beetz from 2009 that gives an overview of developments in collaborative design - it is a bit old already but should give you some idea. You should try to find also the classic paper by Tom Kvan "Collaborative Design: What is it?" (Kvan, T.: 2000. Collaborative design: what is it? Automation in Construction, 9(4), pp. 409–415.)

Kind regards,

Henri Achten

Thanks Henri, I have already read those for some time, very good papers both of them, they are currently in my references list. 

For those following the post, a review which I also found helpful: "IT supported collaborative work in A/E/C projects: A ten-year review", by Xiaolong Xue in the Automation and Construction Journal.

Thanks Calin, I was not aware of the paper by Xialong Xue - much appreciated.