References
  
  [GAP] GAP -- Groups, Algorithms, and Programming, Version 4.4.9, The GAP
  Group, Aachen, St Andrews (2006), (http://www.gap-system.org)
  
  [Lam85]   Lamport,   L.,   LaTeX:   A   Document   Preparation   System,
  Addison-Wesley (1985)
  
  
  
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