Tran, M., Huynh, H., Le, V. and Ngo, T. 2016. Synthesis and characteristics of La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite cathode material by microwave assisted sol – gel method. Science and Technology Development Journal. 19, 3 (Sep. 2016), 41-49. DOI:https://doi.org/https://doi.org/10.32508/stdj.v19i3.584.