Vorster (Ed.), Proceedings of the Third International Conference on Cycad Biology, pp. 55-64, Cycad Society of South Africa, Stellenbosch) and its updates accepted by the Nomenclature Committee, as a guideline when making reference to names of species of Cycadaceae, Stangeriaceae and Zamiaceae.
Vorster (Ed.), Proceedings of the Third International Conference on Cycad Biology, str. 55-64, Cycad Society of South Africa, Stellenbosch) ter dopolnila, ki jih sprejme Odbor za nomenklaturo, kot smernica za navajanje imen vrst družin Cycadaceae, Stangeriaceae in Zamiaceae.