1. Knudson L (1922) Non-symbiotic germination of orchid seeds. Bot Gaz 73:1–25
2. Kauth PJ, Dutra D, Johnson TR, Stewart SL, Kane ME, Vendrame W (2008) Techniques and applications of in vitro orchid seed germination. In: Teixeira da Silva JA (ed) Floriculture, ornamental and plant biotechnology: advances and topical issues, vol V, 1st edn. Global Science Books, Ltd., Isleworth, pp 375–391
3. Arditti J (2022) Orchids – discoverers and firsts. S Afr J Bot 146:815–848
4. Yam TW, Arditti J (2009) History of orchid propagation: a mirror of the history of biotechnology. Plant Biotechnol Rep 3:1–56
5. Yam TW, Yeung EC, Ye X-L, Zee S-Y, Arditti J (2002) Embryology-seeds. In: Kull T, Arditti J (eds) Orchid biology: reviews and perspectives VIII. Kluwer Academic Publishers, Dordrecht, pp 287–385