1. The effect of organic expander materials on the performance, life, surface area and crystal structure of negative electrodes in valve regulated cells;Boden;Journal of Power Sources,2001
2. Central Laboratory for Electrochemical Power Sources, Bulgaria, S.E.A. Tudor, Politecnico di Torino, Brite/Euram Project BE97-4085, Task 3 (1999) Improvement in Negative Plate Performance, Final Report, 1 January 1998 to 31 August 2001. Research Triangle Park, NC: Advanced Lead–Acid Battery Consortium.
3. EUCAR, Traction Battery Working Group (1996) Specification of Test Procedure for Electric Vehicle Traction Batteries.
4. The effect of expanders on lead-sulphate formation and reduction;Francia;Journal of Power Sources,2000
5. Gancheva S and Pavlov D (1993) Influence of expander structure on the performance of lead–acid battery negative plate. Proceedings of the International Conference LABAT’93, pp. 156–159. Varna, Bulgaria.