Analysis of refractometric fiber optic state-of-charge (SOC) monitoring sensor for lead acid battery Patil, Supriya S. ; Labade, V. P. ; Kulkarni, N. M. ; Shaligram, A. D. Abstract Publication: Optik Pub Date: November 2013 DOI: 10.1016/j.ijleo.2013.04.031 Bibcode: 2013Optik.124.5687P