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\bibitem{Janssens_etal1998} {\textquotedblleft}\textit{The use of lead-glass capillaries for microfocusing of highly energetic (0-60 KeV) synchrotron radiation}{\textquotedblright}. Janssens K, Vincze L, Vekemans B, Adams F, Haller M, Kn{\"o}chel A, Journal of analytical atomic spectrometry \textbf{13}, 339 (1998).   http://doi.org/10.1039/A707700I

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