1. Preparation and cleaning of vacuum surfaces, Ch. 4.9;Mattox,1998
2. Surface preparation for vacuum surfaces and vacuum coating, Chapter 21;Mattox,2007
3. A Short History: In Situ Cleaning in Vacuum for Physical Vapor Deposition (PVD);Mattox,2014
4. W.J. Whitfield, Ultra-Clean Room, USP 3158457 (filed 14 May 1962; published 24 Nov. 1964) (assigned US Atomic Energy Commission).
5. Another 50th Anniversary that is Important to the Vacuum Coating Industry;Mattox,2013