| value | technique | year | title_of_literature<MAX120col.> | journal<MAX120col.> | vol | page | name<MAX80col.> |
| 0.4530 | ICPES |
1984.03 | Personal communication, Government Industrial Research Institute, Chugoku, Japan | | | | S.Hirata |
| 0.45 | AA |
1975.04 | Personal communication, Res. Center Jujo Paper Co. Ltd., Japan | | | | M.Tuchiya |
| 0.79 | XRF |
1975.09 | Personal communicatin, Kochi Pref. Res. Center Env. Prot., Japan | | | | J.Yamamoto |
| 0.4309 | AA |
1981.07 | Personal communication, Yamagata University, Japan | | | | Y.Honma |
| 0.33 | INAA |
1982 | Matrix effects of epithermal neutron activation analysis of various kinds of reference materials | J. Radioanal. Chem. | 72 | 377-391 | H.Nakahara, M.Tsukada, |