BLADES, Lyn; HARPER, Geoffrey; HELFER, Stephan; LEE, Maria Luisa; ROGERS, Liz; STEWART, Sandra. Rapid-Survey Methods for Flowering Phenology. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 6, p. 163–179, 2008. DOI: 10.24823/Sibbaldia.2008.41. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/41. Acesso em: 7 apr. 2025.