Hermawan, Dicky, et al. “Design and Development of an Internet of Things-Based Soil PH and Moisture Monitoring System for Oil Palm Plants”. Jurnal SINTIKA (Jurnal Sistem Informasi, Teknik Informatika, Dan Sistem Komputer), vol. 2, no. 3, Sept. 2026, pp. 246-52, https://doi.org/10.65359/t9vq9k07.