Arraq, Rafid Ryyis, and Salih Hadi Kadhim. “Synthesis and Identification of Co3O4·Fe3O4 CaO Spinel Supported Catalyst”. Asian Journal of Chemistry 30, no. 11 (September 27, 2018): 2502–2508. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/30_11_24.