HARPER, Geoff; MANN, David; THOMSON, Roy. Phenological Monitoring at Royal Botanic Garden Edinburgh. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 2, p. 33–45, 2004. DOI: 10.24823/Sibbaldia.2004.101. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/101. Acesso em: 4 jul. 2025.