\begin{thebibliography}{}

\bibitem {HoltRees94}
Derek F.\ Holt and Sarah Rees,  ``Testing modules for irreducibility'',
  {\it J.\ Austral.\ Math.\ Soc.\ Ser.\ A}, {\bf 57}, 1994.

\bibitem{HLOR94a} 
Derek F.\ Holt, Charles R.\ Leedham-Green, E.A.\ O'Brien and Sarah Rees,  
``Computing matrix group decompositions with respect to a normal
  subgroup'', {\it submitted to London Math.\ Soc.}, 1994.


\bibitem{HLOR94b} 
Derek F.\ Holt, Charles R.\ Leedham-Green, E.A.\ O'Brien and Sarah Rees,
    ``Primitivity testing for matrix groups'', {\it submitted to London
  Math.\ Soc.} 1994.

\end{thebibliography}
