M. S. S. Mohamad Basir, A. R. Abdullah, N. A. Selamat, H. Musa, and R. Ranom, “Lead Acid Battery Analysis using S-Transform”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 5, pp. 1832–1839, Oct. 2017.