Hossea, J., et G. Rugumira. Analytical Design of a Portable Surface Plasmon Resonance Sensor by Using a Divergence Beam for Measuring Multiple Heavy Metals and Other Contamination Simultaneously. East African Journal of Engineering, Vol. 7, náµ’ 1, June 2024, p. 148-61, doi:10.37284/eaje.7.1.1967.