NELSON, Charles; PIRIE, Michael. Where have all the heathers gone?. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 21, p. 75–92, 2022. DOI: 10.24823/Sibbaldia.2022.1887. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/1887. Acesso em: 31 may. 2025.