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\bibitem{Gershenzon_etal1987} Gershenzon, Y. M., Goltsman, G. N., Yelantyev, A. I., Petrova, Y. B., Ptitsina, N. G., \& Filatov, V. S. (1987). Lecture demonstrations of properties of superconductors and liquid helium. \textit{USSR Rept Phys. Math. JPRS UPM}, \textit{24}(7), 51.

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