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\bibitem{Gasser1984142}
J~Gasser and H~Leutwyler.
\newblock Chiral perturbation theory to one loop.
\newblock {\em Annals of Physics}, 158(1):142 -- 210, 1984.

\bibitem{Babusci1992158}
D.~Babusci, S.~Bellucci, G.~Giordano, G.~Matone, A.M. Sandorfi, and M.A.
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\newblock Chiral symmetry and pion polarizabilities.
\newblock {\em Physics Letters B}, 277:158 -- 162, 1992.

\bibitem{springerlink:10.1140/epja/i2004-10056-2}
J.~Ahrens, V.~M. Alexeev, J.~R.~M. Annand, H.~J. Arends, R.~Beck, G.~Caselotti,
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\newblock Measurement of the $\pi^{+{}}$ meson polarizabilities via the $\gamma
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\newblock {\em The European Physical Journal A - Hadrons and Nuclei},
  23:113--127, 2005.
\newblock 10.1140/epja/i2004-10056-2.

\bibitem{Antipov1983445}
Yu.M. Antipov, V.A. Batarin, V.A. Bessubov, N.P. Budanov, Yu.P. Gorin, S.P.
  Denisov, I.V. Kotov, A.A. Lebedev, A.I. Petrukhin, S.A. Polovnikov, V.N.
  Roinishvili, D.A. Stoyanova, P.A. Kulinich, G.V. Mecel'macher, A.G.
  Ol'shevski, and V.I. Travkin.
\newblock Measurement of $\pi^{-{}}$ meson polarizability in pion compton
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\newblock {\em Physics Letters B}, 121(6):445 -- 448, 1983.

\bibitem{Gasser200684}
J.~Gasser, M.A. Ivanov, and M.E. Sainio.
\newblock Revisiting at low energies.
\newblock {\em Nuclear Physics B}, 745:84 -- 108, 2006.

\bibitem{PhysRevC.73.035210}
L.~V. Fil'kov and V.~L. Kashevarov.
\newblock Determination of $\pi^{\pm}$ meson polarizabilities from the
  $\gamma\gamma\rightarrow\pi^{+}\pi^{-}$ process.
\newblock {\em Phys. Rev. C}, 73:035210, Mar 2006.

\bibitem{Pasquini:2008fk}
B.~Pasquini.
\newblock Polarizability of the pion: No conflict between dispersion theory and
  chiral perturbation theory.
\newblock {\em Physical Review C}, 77(6), 2008.

\bibitem{PhysRevD.40.2378}
John~F. Donoghue and Barry~R. Holstein.
\newblock Pion transitions and models of chiral symmetry.
\newblock {\em Phys. Rev. D}, 40:2378--2388, Oct 1989.

\bibitem{PhysRev.81.899}
H.~Primakoff.
\newblock Photo-production of neutral mesons in nuclear electric fields and the
  mean life of the neutral meson.
\newblock {\em Phys. Rev.}, 81:899--899, Mar 1951.

\end{thebibliography}