1. 5th Int. Conf. on Electrostatic Accelerators and Associated Boosters;Storm,1990
2. NPL superconducting linac control system
3. Digital Equipment Corporation, Maynard, MA 01754, USA.
4. Carroll Touch Inc., P.O. Box 1309, Round Rock, TX 78680, USA.
5. National Electrostatics Corp., Graber Road, Box 310, Middleton, WI 53562-0310, USA.