Photoperiodism in Apples. Journal of the American Pomological Society, [S. l.], v. 21, n. 4, p. 82–82, 1967. DOI: 10.71318/apom.1967.21.4.82b. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/883. Acesso em: 16 dec. 2025.