1. V. Alpine, “Treatment of Spent Primary Batteries,” Jpn. Kokai Tokkyo Koho JP, 63 (24) (1988), p. 560.
2. W.F. Gerled and L. Willi, “Recovery of Waste Batteries” (Paper presented at the Hazard. Waste: Detect., Control, Treat., Proc. World Conf., (Amsterdam, Netherlands, 1987).
3. C. Nicolae, Rom. RO, 90 (1988), p. 70.
4. C. Shaoguo, “Comprehensive Utilization of Spent Dry Cells,” Huaxue Shijie, 26 (11) (1985), pp. 427–428.
5. F. Siegmund and S. Siegried, “Metal Recovery from Spent Batteries by Acid Leaching with Separation of Manganese Dioxide,” Ger. Offen. DE 4,329,086 (1995).