1. A.G. Morgachevskii, New ways in technologies of processing disintegrated lead batteries (review), Journal of Applied Chemistry, 1997 (in Russian).
2. N.K. Lyakov, Autoessay on PhD Dissertation, Sofia, 1990 (in Bulgarian).
3. N.V. Hodov, O.K. Kuznetzov, Patent Russia, RU 2016104, 1994 (in Russian).
4. E.P. Cole, A.Y. Lee, Jr., I. Paulson, Update on recovering lead from scrap batteries, Journal of Metals, 1985 (in English).
5. N.K. Lyakov, Desulphurization of Damped Lead Battery Paste, Yearbook of Higher Institute of Chemical Technology, Sofia, 1993 (in Bulgarian).