1. R. Bird, J. Williams, Ion Beams for Materials Analysis (Academic, New York, 2003)
2. CEA, Sunnyvale/CAL. http://www.cea.com/tech.htm#rbs1 (2003)
3. Charles Evans & Associates, Sunnyvale/CA. http://www.cea.com/tech.htm
4. Harvard University, Materials Res. Ctr., Cambridge/MA. http://www.mrsec.harvard.edu/default.html (2003)
5. Proton microprobe, University of Oxford, Oxford, OX1 2JD, UK