N. A. Nazli, M. S. Najib, S. Mohd Daud, M. . Mohammad, Z. Baharum, and M. Y. . Ishak, “Intelligent Classification of Cocoa Bean using E-nose”, Mekatronika : J. Intell. Manuf. Mechatron., vol. 2, no. 2, pp. 28–35, Nov. 2021, doi: 10.15282/mekatronika.v2i2.6747.