HARPER, Geoffrey; MORRIS, Leigh. Flowering and Climate Change: Part II. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 5, p. 25–42, 2007. DOI: 10.24823/Sibbaldia.2007.4. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/4. Acesso em: 29 may. 2025.