\begin{thebibliography}{Ald98}

\bibitem[Ald98]{Ald98}
David Aldous.
\newblock Tree-valued {M}arkov chains and {P}oisson-{G}alton-{W}atson
  distributions.
\newblock In {\em Microsurveys in discrete probability ({P}rinceton, {NJ},
  1997)}, volume~41 of {\em DIMACS Ser. Discrete Math. Theoret. Comput. Sci.},
  pages 1--20. Amer. Math. Soc., Providence, RI, 1998.

\bibitem[FS09]{FS09}
Philippe Flajolet and Robert Sedgewick.
\newblock {\em Analytic combinatorics}.
\newblock Cambridge University Press, Cambridge, 2009.

\end{thebibliography}
