Putri, Nella Aulia, et al. “Development of a Cr(VI) Metal Ion Detection Sensor Using a Modified Pencil Lead Electrode (PLE) With a Silver Thin Layer Using the Voltammetry Method”. Acta Chimica Asiana, vol. 9, no. 1, May 2026, pp. 859-66, doi:10.29303/aca.v9i1.251.