McHaffie, Heather, Natacha Frachon, and Ashley Robertson. “Starting a Conservation Collection of Sorbus Pseudomeinichii: The Catacol Whitebeam”. Sibbaldia: the International Journal of Botanic Garden Horticulture, no. 9 (October 31, 2011): 171–178. Accessed April 29, 2024. https://journals.rbge.org.uk/rbgesib/article/view/129.