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\bibitem{Xing_etal2008} {\textquotedblleft}\textit{Spontaneous vortex phases in superconductor-ferromagnet Pb-Co nanocomposite films}{\textquotedblright}. Xing YT, Micklitz H, Rappoport TG, Milo{\v s}evi{\'c} MV, Solorzano-Naranjo IG, Baggio-Saitovitch E, Physical review : B : solid state \textbf{78}, 224524 (2008).   http://doi.org/10.1103/PhysRevB.78.224524

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