RAE, David. Foreword. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 5, p. 1–3, 2007. DOI: 10.24823/Sibbaldia.2007.1. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/1. Acesso em: 13 apr. 2025.