B LAPSIWALA, Pranav; ., . Optical Sensor for Analysis of Amonia, Iron and Manganese Nutrients. International Journal of Engineering and Technology, [S. l.], v. 7, n. 4.5, p. 288–291, 2018. DOI: 10.14419/ijet.v7i4.5.20091. Disponível em: https://mail.sciencepubco.com/index.php/IJET/article/view/20091.. Acesso em: 6 jun. 2025.