D. P. Sari, N. A. Masruroh, and A. M. S. Asih, “Eco-Efficiency Comparative Analysis of Informal and Formal Smartphone Recycling Practices Using Life Cycle Assessment”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 13, no. 3, pp. 1108–1117, Jun. 2023.