%0 Journal Article %T Magnetically recoverable ferromagnetic 3D hierarchical core-shell Fe3O4@NiO/Co3O4 microspheres as an efficient and ligand-free catalyst for C–S bond formation in poly (ethylene glycol) %A Vatandoust, Ahad %A Akhlaghinia, Batool %A Mohammadinezhad, Arezoo %J Journal of Sulfur Chemistry %@ 1741-5993 %D 2020