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\bibitem{PtitsinaN.G._etal1997} Ptitsina N. G., Chulkova G. M., Il{\textquoteright}in K. S., Sergeev A. V., Pochinkov F. S., \& Gershenzon E. M. (1997). Superconductivity has been found in a number of new compounds between the non-superconducting transition elements and nonmetals such as Si, Ge, and Te. These findings have suggested possible criteria for superconductivity in both elements and compounds. \textit{Phys. Rev. B}, \textit{56}(16).

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