1991

Altermann, Wladyslaw and Herbig, Hans-Georg (1991): Tidal flat deposits of the Lower Proterozoic Campbell Group along the southwestern margin of the Kaapvaal Craton, Northern Cape Province, South Africa. In: Journal of African Earth Sciences, Vol. 13, No. 3-4: pp. 415-435

1987

Altermann, Wladyslaw and Herbig, Hans-Georg (1987): Bericht vom XI-ten Internationalen Karbon Kongreß in Beijing, 31.08.-04.09.1987 China. In: Nachrichten / Deutsche Geologische Gesellschaft, Vol. 38: pp. 58-60