MOTSWAKAE, Tefo; M. SHEIKH, Sajid; M. NGEBANI, Ibo. Low-Cost Long Range IoT Communication Systems for Smart Farming Applications in Developing Countries. American Scientific Research Journal for Engineering, Technology, and Sciences, Jordan, v. 73, n. 1, p. 186–199, 2020. Disponível em: https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/6331. Acesso em: 17 sep. 2025.