(en) G.A.F. Molengraaff, Geology of the Transvaal, Édimbourg & Johannesburg, (lire en ligne), p. 42-57.
doi.org
dx.doi.org
(en) S.L. Kamo, W.U. Reimold, T.E. Krogh et W.P. Colliston, « A 2.023 Ga age for the Vredefort impact event and a first report of shock metamorphosed zircons in pseudotachylitic breccias and Granophyre », Earth and Planetary Science Letters, vol. 144, nos 3–4, , p. 369-387 (DOI10.1016/S0012-821X(96)00180-X, lire en ligne)
sciencedirect.com
(en) S.L. Kamo, W.U. Reimold, T.E. Krogh et W.P. Colliston, « A 2.023 Ga age for the Vredefort impact event and a first report of shock metamorphosed zircons in pseudotachylitic breccias and Granophyre », Earth and Planetary Science Letters, vol. 144, nos 3–4, , p. 369-387 (DOI10.1016/S0012-821X(96)00180-X, lire en ligne)