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\bibitem{VanSchandevijl_etal1971} {\textquotedblleft}\textit{The half-life of $^{28}$Al}{\textquotedblright}. Van Schandevijl R, Van Grieken R, Hoste J, Journal of radioanalytical chemistry \textbf{9}, 55 (1971).   http://doi.org/10.1007/BF02514012

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