参考文献
Stanko, V. I.; Klimova, T. V.; Beletskaya, I. P.
Doklady Akademii Nauk SSSR, 1974 , vol. 214/219, p. 322 - 324
Doklady Akademii Nauk SSSR, 1974 , vol. 216, p. 329 - 332
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Gmelin Handbook: B: B Comp.SVol.1/3, 13.18.3.2, page 213 - 227