| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 2.31 | INAA |
1987.09 | Personal communication, National Sci. Museum, Tokyo, Japan | | | | F.Wakabayashi and M.Shima |
| 2.2000 | IDMS |
1991.04 | Determination of thirteen rare-earth elements by high-performance liquid chromatography in thirty and of K, Rb, Cs, Sr and Ba by isotope dilution mass spectrometry in eighteen international geochemical reference samples | Geost. Newsletter | 15 | 129-134 | S.P.Verma |
| 2.2 | INAA |
1996 | A Self-Consistent Compilation of Elemental Concentration Data for 93 Geochemical Reference Samples | Geostandards Newsletter | 20 | 217-245 | Randy L.Korotev |