ENSOLL, Andrew; GALLOWAY, Louise; WARDLAW, Alastair. Winter Protection of Tree Ferns at the Royal Botanic Garden Edinburgh. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 5, p. 141–154, 2007. DOI: 10.24823/Sibbaldia.2007.14. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/14. Acesso em: 1 jun. 2025.