“Chemical and Electrochemical Recycling of Nickel from the Positive Electrode of Spent Nickel: Cadmium Batteries in Sulphuric Acid”. Hadhramout University Journal of Natural & Applied Sciences, vol. 16, no. 2, Nov. 2023, https://hu.edu.ye/hu-publications/journals/index.php/hujnas/article/view/117.