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Finland | |
| Economic Geology (1996) 91:1335-1353 |
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Russia | |
| Bazai, A. V., Ivanyuk, G. Y., Pakhomovsky, Y. A., Goryainov, P. M., & Yakovenchuk, V. N. (2009). Native elements in rocks of the banded iron formation, Kola Peninsula. Geology of Ore Deposits, 51(7), 525-536. |
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Sweden | |
| Ciobanu, C. L. (2005): Kostovite and its argentian varieties: Deposits and mineral associations. Bulgarian Academy of Sciences, Geochemistry, Mineralogy and Petrology. 42, 1-22 Bonev, I.K. Petrunov, R. Cook, N. J. |