graph3.bbl
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\begin{thebibliography}{10}

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\bibitem{Ni86b}
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\bibitem{SZu}
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\bibitem{Sims94}
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\bibitem{Sta83}
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\bibitem{Sta87}
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\bibitem{Sta91}
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\bibitem{Tak51}
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\bibitem{We99}
R.~Weidmann, \emph{A {G}rushko theorem for 1-acylindrical splittings}, Bochum
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\bibitem{Wise97}
D.~T. Wise, \emph{The residual finiteness of negatively curved polygons of
  finite groups}, Cornell University, preprint, 1997.

\bibitem{Wise98}
\bysame, \emph{The residual finiteness of positive one-relator groups}, Cornell
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\bibitem{Wise99}
\bysame, \emph{A residually finite version of {R}ips' construction}, Cornell
  University, preprint, 1999.

\end{thebibliography}
