Si, Jingyu, and Weitao Bao. “Liquid-Solid Reaction Method to Synthesize La0.7Sr0.3MnO3 Powder As Cathode for Solid Oxide Fuel Cell”. Asian Journal of Chemistry, vol. 24, no. 9, May 2012, pp. 4101-2, https://asianpubs.org/index.php/ajchem/article/view/9558.