1. “The non-destructive determination of REE in fossilized bone using synchrotron radiation induced K-line X-ray microfluorescence analysis”. Janssens K, Vincze L, Vekemans B, Williams CT, Radtke M, Haller M, Knöchel A, Fresenius' journal of analytical chemistry 363, 413 (1999).   http://doi.org/10.1007/S002160051212