Churchill, S. E., Brink, J. S., Berger, L. R., Hutchison, R. A., Rossouw, L., Stynder, D., … Ungar, P. (2000). Erfkroon: A new Florisian fossil locality from fluvial contexts in the western Free State, South Africa. South African Journal of Science, 96(4), 161–163.

Churchill, S. E., J. S. Brink, L. R. Berger, R. A. Hutchison, L. Rossouw, D. Stynder, P. J. Hancox, et al. “Erfkroon: A new Florisian fossil locality from fluvial contexts in the western Free State, South Africa.” South African Journal of Science 96, no. 4 (January 1, 2000): 161–63.

Churchill SE, Brink JS, Berger LR, Hutchison RA, Rossouw L, Stynder D, et al. Erfkroon: A new Florisian fossil locality from fluvial contexts in the western Free State, South Africa. South African Journal of Science. 2000 Jan 1;96(4):161–3.

Churchill, S. E., et al. “Erfkroon: A new Florisian fossil locality from fluvial contexts in the western Free State, South Africa.” South African Journal of Science, vol. 96, no. 4, Jan. 2000, pp. 161–63.

Churchill SE, Brink JS, Berger LR, Hutchison RA, Rossouw L, Stynder D, Hancox PJ, Brandt D, Woodborne S, Loock JC, Scott L, Ungar P. Erfkroon: A new Florisian fossil locality from fluvial contexts in the western Free State, South Africa. South African Journal of Science. 2000 Jan 1;96(4):161–163.