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\begin{thebibliography}{10}

\bibitem{bpv}
W.~Barth, C.~Peters, and A.~Van de~Ven, \emph{Compact complex surfaces},
  Ergebnisse der Mathematik und ihrer Grenzgebiete (3), vol.~4,
  Springer-Verlag, Berlin, 1984.

\bibitem{ctsan}
J-L. Colliot-Th{\'e}l{\`e}ne and J-J. Sansuc, \emph{La {$R$}-\'equivalence sur
  les tores}, Ann. Sci. \'Ecole Norm. Sup. (4) \textbf{10} (1977), no.~2,
  175--229.

\bibitem{css}
J-L. Colliot-Th{\'e}l{\`e}ne, A.~N. Skorobogatov, and Sir~Peter
  Swinnerton-Dyer, \emph{Hasse principle for pencils of curves of genus one
  whose {J}acobians have rational {$2$}-division points}, Invent. math.
  \textbf{134} (1998), no.~3, 579--650.

\bibitem{harari}
D.~Harari, \emph{Obstructions de {M}anin transcendantes}, Number theory (Paris,
  1993--1994), London Math. Soc. Lecture Note Ser., vol. 235, Cambridge Univ.
  Press, Cambridge, 1996, pp.~75--87.

\bibitem{kod}
K.~Kodaira, \emph{On compact analytic surfaces {II}}, Ann. of Math. (2)
  \textbf{77} (1963), 563--626.

\bibitem{neron}
A.~N{\'e}ron, \emph{Mod\`eles minimaux des vari\'et\'es ab\'eliennes sur les
  corps locaux et globaux}, Inst. Hautes \'Etudes Sci. Publ. Math. No.~
  \textbf{21} (1964).

\bibitem{serre}
J-P. Serre, \emph{Corps locaux}, Hermann, Paris, 1968.

\bibitem{shaf}
I.~R. Shafarevich, \emph{Lectures on minimal models and birational
  transformations of two dimensional schemes}, Notes by C.~P. Ramanujam, Tata
  Institute of Fundamental Research Lectures on Mathematics and Physics,
  No.~37, Tata Institute of Fundamental Research, Bombay, 1966.

\bibitem{silv}
J.~H. Silverman, \emph{The arithmetic of elliptic curves}, Graduate Texts in
  Mathematics, vol. 106, Springer-Verlag, New York, 1992.

\bibitem{tate}
J.~Tate, \emph{Algorithm for determining the type of a singular fiber in an
  elliptic pencil}, Modular functions of one variable, IV (Proc. Internat.
  Summer School, Univ. Antwerp, Antwerp, 1972), Springer, Berlin, 1975,
  pp.~33--52, Lecture Notes in Math., Vol. 476.

\end{thebibliography}