RAKHMADI, F. A. .; ZAHROH, H. . Detection System Design for Cu Contaminated Water Based on Red Diode Laser and LDR (Light Dependent Resistor) Sensor. Proceeding International Conference on Science and Engineering, [S. l.], v. 1, p. 99–101, 2017. DOI: 10.14421/icse.v1.289. Disponível em: https://www.sunankalijaga.org/prosiding/index.php/icse/article/view/289. Acesso em: 30 jul. 2026.