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\bibitem{Betouras_etal2003} {\textquotedblleft}\textit{Ginzburg-Landau theory and effects of pressure on a two-band superconductor : application to MgB$_{2}$}{\textquotedblright}. Betouras JJ, Ivanov VA, Peeters FM, European physical journal : B : condensed matter and complex systems \textbf{31}, 349 (2003).   http://doi.org/10.1140/epjb/e2003-00041-7

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