HEYWOOD, Vernon. Botanic Gardens and Genetic Conservation. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 7, p. 5–18, 2009. DOI: 10.24823/Sibbaldia.2009.148. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/148. Acesso em: 7 apr. 2025.