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\bibitem{Vagov_etal2012} {\textquotedblleft}\textit{Two-band superconductors : extended Ginzburg-Landau formalism by a systematic expansion in small deviation from the critical temperature}{\textquotedblright}. Vagov A, Shanenko AA, Milo{\v s}evi{\'c} MV, Axt VM, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{86}, 144514 (2012).   http://doi.org/10.1103/PhysRevB.86.144514

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