@inproceedings {BrHu, 
    author = "Brown, Ronald and Huebschumann, Johannes",
     title = "Identities Among Relations",
 booktitle = "Low-Dimensional Topology",
    series = "London Math. Soc. Lecture Note Series",
    volume = "46",
    editor = "Brown, R. and Thickstun, T.L.",
 publisher = "Cambridge University Press", 
      year = "1982", 
     pages = "153-202",
}

@article {BrSa,
    author = "Brown, R. and Razak Salleh, A.", 
     title = "On the computation of identities among relations and of free crossed resolutions of groups",
   journal = "London Math. Soc. J. Comput. Math.", 
    volume = "2",
      year = "1999", 
     pages = "28-61",
}

@inproceedings {HeWe1,
    AUTHOR = "Heyworth, Anne and Wensley, Christopher D.",
     TITLE = "Logged rewriting and identities among relators",
 booktitle = "Groups St Andrews 2001 in Oxford",
series     = "London Math. Soc. Lecture Note Series",
volume     = "304",
editor     = "C.~M.~Campbell and E.~F.~Robertson and G.~C.~Smith",
publisher  = "Cambridge University Press",
year       = "2003",
pages      = "256-276",
}

@phdthesis{anne-thesis,
author             = "Heyworth, Anne",
title              = "Applications of Rewriting Systems and {G}roebner Bases to Com
puting {K}an Extensions and Identities Among Relations",
type               = "Ph.{D}.~thesis",
year               = "1999",
school             = "University of Wales, Bangor",
}