S. Supriyadi, F. D. Dzikrillah, R. B. Arniputri, and R. Wijayanti, “The Effect of Shade Trees in the Coffee Ecosystem to the Population and Diurnal Activity of Insect Pollinators”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 10, no. 4, pp. 1743–1749, Aug. 2020.