| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 4.8 | ICPES |
1998 | Personal communication,GSJ,Japan | | | | S.Terashima |
| 4.8 | ICPES |
1998 | Alkali fusion/ICP-AES for the determination of boron in geological reference materials and a comperison with spectrophotometry | BUNSEKI KAGAKU | 47 | 451-454 | S.Terashima,T.Okai and M.Taniguchi |
| 5.08 | GAMMA |
1999 | Determination of boron in Japanese geochemical reference samples by neutron-induced prompt gamma-ray analysis | Journal of Radioanalytical and Nuclear Chemistry | 239 | 571-57 | C.Yonezawa,P.P.Ruska,H.Matsue,M.Magara and T.Adach |
| 6 | OES |
1999 | Personarl Communication, Institute of Geology, Estonia | | | | T. Kiipli |