by Smit, J. P., Stettler, E. H., Price, A. B. W., Schaefer, M. O., Schodlok, M. C., Zhang, R.
Published in Mineral economics : raw materials report (01.12.2022)

by Ranganai, R. T., Kampunzu, A. B., Atekwana, E. A., Paya, B. K., King, J. G., Koosimile, D. I., Stettler, E. H.
Published in Geophysical journal international (01.06.2002)

by Cooper, G. R. J., Stettler, E. H.
Published in Pure and applied geophysics (01.03.2017)

by Ranganai, R. T., Kampunzu, A. B., Atekwana, E. A., Paya, B. K., King, J. G., Koosimile, D. I., Stettler, E. H.
Published in Geophysical journal international (01.06.2002)