A. B. . Llaban and R. C. A. Ang, “Non-Destructive On-Field Determination of Pineapple (Ananas Comosus L.) Maturity using Acoustic Impulse Impedance Technique”, CMUJS, vol. 25, no. 1, pp. 19–25, Oct. 2021, doi: 10.52751/fjvy1283.