DING, Chengqiao; WANG, Dachen; FENG, Zhe; CUI, Di. Detection of apple firmness with a novel loudspeaker-based excitation device. International Journal of Agricultural and Biological Engineering, [S. l.], v. 15, n. 1, p. 260–266, 2022. Disponível em: https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/7028. Acesso em: 26 feb. 2026.