Lerssongkram, Neungnuch, Supree Pinitsoontorn, and Nittaya Keawprak. “Synthesis and thermoelectric properties of Ca3Co4O9 prepared by sol-gel method using ova”. Asia-Pacific Journal of Science and Technology 16, no. 1 (April 13, 2017): 11–19. accessed September 27, 2026. https://so01.tci-thaijo.org/index.php/APST/article/view/83163.