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\bibitem{vanLangevelde_etal1992} {\textquotedblleft}\textit{Prediction of the optical characteristics and analytical qualities of an X-ray fluorescence microprobe at the European Synchrotron Radiation Facility (Grenoble)}{\textquotedblright}. van Langevelde F, Janssens KH, Adams FC, Vis RD, Nuclear instruments and methods in physics research : A: accelerators, spectrometers, detectors and associated equipment \textbf{317}, 383 (1992).   http://doi.org/10.1016/0168-9002(92)90632-E

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