’Sweetie Pie’ Thornless Semi-Erect Blackberry. Journal of the American Pomological Society, [S. l.], v. 71, n. 4, p. 214–219, 2017. DOI: 10.71318/apom.2017.71.4.214. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/2981. Acesso em: 9 dec. 2025.