Radford, Elizabeth, Michael Dossman, and David Rae. “The Management of ’Ad Hoc’ Ex Situ Conservation Status Species at the Royal Botanic Garden Edinburgh :: A Review of Options”. Sibbaldia: the International Journal of Botanic Garden Horticulture, no. 1 (October 31, 2003): 43–80. Accessed April 29, 2024. https://journals.rbge.org.uk/rbgesib/article/view/155.