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% \bibitem{bur97}
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% \bibitem{dil50}
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% \bibitem{dir52}
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% \bibitem{hal35}
%   P. Hall.
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%   \emph{Journal London Mathematical Society} 10(1):26--30, 1935.

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% \bibitem{kas61}
%   P. W. Kasteleyn.  
%   The statistics of dimers on a lattice: I. The number of dimer arrangements on a quadratic lattice.
%   \emph{Physica}, 27(12):1209--1225, 1961.

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% \bibitem{kon31}
%   D. Kőnig.
%   Gráfok és mátrixok.
%   \emph{Matematikai és Fizikai Lapok}, 38(1):116--119, 1931.

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% \bibitem{ore60}
%   Ø. Ore.
%   Note on Hamilton circuits.
%   \emph{The American Mathematical Monthly}, 67(1):55, 1960.

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% \bibitem{pic99}
%   G. Pick.
%   Geometrisches zur Zahlenlehre.
%   \emph{Sitzungsberichte des deutschen naturwissenschaftlich-medicinischen Vereines
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% \bibitem{pru18}
%   H. Prüfer.
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% \bibitem{tem61}
%   H. N. V. Temperley and M. E. Fisher.
%   Dimer problem in statistical mechanics -- an exact result.
%   \emph{Philosophical Magazine}, 6(68):1061--1063, 1961.

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\bibitem{war62}
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% \bibitem{zec72}
%   E. Zeckendorf.
%   Représentation des nombres naturels par une somme de nombres de Fibonacci ou de nombres de Lucas.
%   \emph{Bull. Soc. Roy. Sci. Liege}, 41:179--182, 1972.

\end{thebibliography}
