How to Transform Standard-Sized Apple and Pear Trees into Semi-Dwarfs. Journal of the American Pomological Society, [S. l.], v. 27, n. 4, p. 87–89, 1973. DOI: 10.71318/apom.1973.27.4.87. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1171. Acesso em: 9 dec. 2025.