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\bibitem{Zha_etal2014} {\textquotedblleft}\textit{Majorana fermion states and fractional flux periodicity in mesoscopic d-wave superconducting loops with spin-orbit interaction}{\textquotedblright}. Zha G-Q, Covaci L, Peeters FM, Zhou S-P, Physical review : B : condensed matter and materials physics \textbf{90}, 014522 (2014).   http://doi.org/10.1103/PhysRevB.90.014522

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