Khatami, Seyed-Mola, et al. “Alkyl Ammonium Tungstate Bonded to Fe3O4@SiO2 Nanoparticles; A Highly Efficient Catalyst for the Oxidation of Symmetrical Sulfides to Symmetrical Sulfoxides”. Iranian Journal of Catalysis, vol. 13, no. 4, Dec. 2023, https://doi.org/10.30495/ijc.2023.1993331.2039.