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\bibitem{paulk95}
M.~Paulk, C.~Weber, B.~Curtis, and M.~Chriss, \emph{The Capability Maturity
  Model: Guidelines for Improving the Software Process}.\hskip 1em plus 0.5em
  minus 0.4em\relax Addison-Wesley, 1995.

\bibitem{me01e}
T.~Menzies and J.~Kiper, ``Better reasoning about software engineering
  activities,'' in \emph{ASE-2001}, 2001, available from
  \url{http://menzies.us/pdf/01ase.pdf}.

\bibitem{leveson91}
N.~Leveson, S.~Cha, and T.~Shimall, ``Safety verification of {ADA} programs
  using software fault trees,'' \emph{IEEE Software}, vol.~8, no.~7, pp.
  48--59, July 1991.

\end{thebibliography}