1. F.E. Paige and S.D. Protopopescu, ISAJET — A Monte Carlo event generator for ISABELLE, BNL, Upton, NY 11973, USA.
2. International Critical Tables, vol. 7, p. 11.
3. Mir-Acryl, 13 000 Haggerty Rd., Belleville, MI 48111, USA.
4. Eagle Convex Glass, 415 Tuna St., Clarksburg, WV 26301, USA.
5. Evaporated Metal Films, 701 Spencer Rd., Ithaca, NY 14850, USA.