Llaban, Audry B., and Roejae Carlo A. Ang. “Non-Destructive On-Field Determination of Pineapple (Ananas Comosus L.) Maturity Using Acoustic Impulse Impedance Technique”. CMU Journal of Science 25, no. 1 (October 18, 2021): 19–25. Accessed May 20, 2024. http://js.cmu.edu.ph/CMUJS/article/view/85.