CERN's timing systems are one of the most complex things I've researched for HowStuffWorks. That's partially because there's no single system at work in all of CERN's many particle accelerators -- different installations have different requirements -- and the accuracy of the timing systems comes down to the nanosecond. Biggest surprise: Even the smallest adjustment of an antenna can impact the synchronization of timing devices.
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- CERN. "CERN Press Release." (July 5, 2012) http://press.web.cern.ch/press/PressReleases/Releases2011/PR19.11E.html
- CERN. "Timing, Trigger and Control (TTC) Systems for the LHC." June 28, 2011. (July 6, 2012).
- Evans, Lyndon and Philip Bryant. "LHC Machine." August 14, 2008. (July 7, 2012) http://www.scribd.com/doc/9143905/122/The-WorldFIP-%EF%AC%81eldbus
- Feldmann, Thorsten. "Relative calibration of the GPS time link between CERN and LNGS." September 2011. (July 5, 2012) http://operaweb.lngs.infn.it/Opera/publicnotes/note134.pdf
- Operaweb.lngs.infn.it. "About OPERA." (July 5, 2012) http://operaweb.lngs.infn.it/spip.php?rubrique1
- WorldFIP.org. "WorldFIP Protocol." (July 6, 2012) http://www.worldfip.org/basics2.html