Thornless Blackberry ‘Perron’s Black’. Journal of the American Pomological Society, [S. l.], v. 41, n. 3, p. 87–87, 1987. DOI: 10.71318/apom.1987.41.3.87. Disponível em: https://journal.americanpomological.org/index.php/jofaps/article/view/1738. Acesso em: 3 feb. 2026.