Z. Mubarak, N. M. Nursam, S. Shobih, J. Hidayat, and D. Tahir, “A Comparison of the Utilization of Carbon Nanopowder and Activated Carbon as Counter Electrode for Monolithic Dye-Sensitized Solar Cells (DSSC)”, Jurnal Elektronika dan Telekomunikasi, vol. 18, no. 1, pp. 15–20, Aug. 2018, doi: 10.14203/jet.v18.15-20.