1. P. Bourgeois, J. Va’vra, Corrosion of glass windows of DIRC PMTs, ICFA Instrumentation Bulletin, Vol. 22, Spring 2001, http://www.slac.stanford.edu/pubs/icfa/spring01/paper3/paper3.pdf.
2. B. Guerard, A. Oed, private communication.
3. F. Anulli, et al., Performances of RPCs in the BaBar experiment, Nucl. Instr. and Meth. A, (2003) these proceedings.
4. C. Lu, private communication (this effect was also simulated in the lab), Princeton University.
5. M. Piccolo, private communication.