HARPER, Geoffrey. A Correlation and Regression Approach to Phenology. Sibbaldia: the International Journal of Botanic Garden Horticulture, [S. l.], n. 7, p. 139–157, 2009. DOI: 10.24823/Sibbaldia.2009.165. Disponível em: https://journals.rbge.org.uk/rbgesib/article/view/165. Acesso em: 2 may. 2024.