Supriyadi, S.; Dzikrillah, F. D.; Arniputri, R. B.; Wijayanti, R. 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. 2020, 10, 1743-1749.