Blossoms and Fruit on One Branch of Pear. Journal of the American Pomological Society, [S. l.], v. 22, n. 1, p. 18–18, 1968. DOI: 10.71318/apom.1968.22.1.18a. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/905. Acesso em: 9 dec. 2025.