Scholz, C. H.; Koczynski, T. A.; Hutchins, D. G. Evidence for Incipient Rifting in Southern Africa. Geophysical Journal International (Oxford University Press (OUP)). 1976-01-01, 44 (1): 135–144. ISSN 0956-540X. doi:10.1111/j.1365-246x.1976.tb00278.x.
Scholz, C. H.; Koczynski, T. A.; Hutchins, D. G. Evidence for Incipient Rifting in Southern Africa. Geophysical Journal International (Oxford University Press (OUP)). 1976-01-01, 44 (1): 135–144. ISSN 0956-540X. doi:10.1111/j.1365-246x.1976.tb00278.x.