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For other forms of quintessence, see Quintessence (disambiguation).
For the flute ensemble, see Quintessenz - Leipziger Querflötenensemble.
Founded in 1994, Quintessenz works on Internet and on-line liberty issues in co-operation with other civil liberties advocates around the world.
- McCullagh, Declan (7 April 1999). "Big Brother Taps the Bitstream". Wired News. Retrieved 24 Jul 2014.
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