  
  
  [1XReferences[0X
  
  [[20XBH82[15X]  [16XBrown,  R. and Huebschumann, J.[15X ([1m[31mBrown, R. and Thickstun, T. L.[15X,
  Eds.),   [17XIdentities   Among   Relations[15X,  in  Low-Dimensional  Topology,
  Cambridge  University  Press,  London Math. Soc. Lecture Note Series, [19X46[15X
  (1982), 153-202.
  
  [[20XBS99[15X]  [16XBrown, R. and Razak Salleh, A.[15X, [17XOn the computation of identities
  among  relations and of free crossed resolutions of groups[15X, [18XLondon Math.
  Soc. J. Comput. Math.[15X, [19X2[15X (1999), 28-61.
  
  [[20XHey99[15X]  [16XHeyworth,  A.[15X,  [17XApplications  of Rewriting Systems and Groebner
  Bases  to  Com  puting  Kan  Extensions  and Identities Among Relations[15X,
  Ph.{D}.~thesis, University of Wales, Bangor (1999).
  
  [[20XHW03[15X]  [16XHeyworth,  A. and Wensley, C. D.[15X ([1m[31mCampbell, C. M., Robertson, E.
  F.  and  Smith,  G.  C.[15X,  Eds.),  [17XLogged  rewriting and identities among
  relators[15X,  in  Groups  St  Andrews  2001 in Oxford, Cambridge University
  Press, London Math. Soc. Lecture Note Series, [19X304[15X (2003), 256-276.
  
  
  
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