Searching the Bass Player Archives I found a number of articles by Michael Manring on Alternative Tunings(Oct '92, Jan/Feb '95, Oct '97, Dec '97) and several titles specifically mentioning CGDA (Jan/Feb '93, March '93, April '93). Oct '92 and April '93 are unfortunately no longer available. I will buy or try to track these down.
Red Mitchell
http://www.teleport.com/~mimuma/arti..._mitchell.html
Limited site but evidently while he was working in Hollywood for MGM the requests of composers like Henry Mancini caused him to turn to CGDA tuning in 1966.
Jole Quarrington (Principle Bassist for Toronto Symphony)
http://www.interlog.com/~henshaw/joel.html
This is a great site focused on classical double bass. Joel is a big advocate of playing in fifths (like the standard tuning for cello, viola, and violin). An article on double bass history implys that the limits of string technology a century or two back forced the double bass into to stay in fourths despite experimentation in fifths.