Suhartono, et al. “Development of Automatic Drip Fertigation and Environmental Control Based on IoT for Lettuce Growth (Lactuca Sativa L.)”. Jurnal BETA (Biosistem Dan Teknik Pertanian), vol. 11, no. 1, Feb. 2026, pp. 67-77, doi:10.24843/JBETA.2023.v11.i01.p08 .