S. Supriyadi, R. Rahayu, D. P. Ariyanto, and D. Prastiwi, “Quality Index and Land Suitability for Cocoa Plants in Bandar District, Pacitan Regency, East Java”, J. Ilmu. Pertan. Indones., vol. 31, no. 1, pp. 23–32, Oct. 2025, doi: 10.18343/jipi.31.1.23.