Jha, M.K., Kumar, V. and Singh, R.J. (2001) Review of Hydrometallurgical Recovery of Zinc from Industrial Wastes. Resources, Conservation and Recycling, 33, 1-22.
 Rabah, M.A. and El-Sayed, A.S. (1995) Recovery of Zinc and Some of Its Valuable Salts from Secondary Resources and Wastes. Hydrometallurgy, 37, 23-32.
 Sinadinovic, D., Kamberovic, Z. and Sutic, A. (1997) Leaching Kinetics of Lead from Lead (II) Sulphate in Aqueous Calcium Chloride and Magnesium Chloride Solutions. Hydrometallurgy, 47, 137-147.
 Abdollahi, P., Moradkhani, D., Behnian, D. and Yozbashizadeh, H. (2006) Lead Recovery from Iranian Zinc Plant Residue Using Brine Leaching Method. Proceedings of XXII International Mineral Processing Congress, Istanbul, 1515-1520.
 Arai, K. and Toguri, J.M. (1984) Leaching of Lead Sulphate in Sodium Carbonate Solution. Hydrometallurgy, 12, 49-59.
 Raghavan, R., Mohanan, P.K. and Swarnkar, S.R. (2000) Hydrometallurgcal Processing of Lead-Bearing Materials for the Recovery of Lead and Silver as Lead Concentrate and Lead Metal. Hydrometallurgy, 58, 103-116.
 Raghavan, R., Mohanan, P.K. and Patnaik, S.C. (1998) Innovative Processing Technique to Produce Zinc Concentrate from Zinc Leach Residue with Simultaneous Recovery of Lead and Silver. Hydrometallurgy, 48, 225-237.
 Turan, M.D., Altundogan, H.S. and Tumen, F. (2004) Recovery of Zinc and Lead from Zinc Plant Residue. Hydrometallurgy, 75, 169-176.