Nguyen, T.H., Tran, T.T., Nguyen, P.D. and Lee, M.S. 2024. A green approach to recovering lithium and cobalt from spent lithium-ion batteries using dilute HCl solution mixed with H. sabdariffa flower extract as a leaching agent. Journal of Mining and Metallurgy, Section B: Metallurgy. 60, 2 (Nov. 2024), 215-225.