Preparation and characterization of chitosan-coated Fe3O4 nanoparticles using ex-situ co-precipitation method and tripolyphosphate/sulphate as dual crosslinkers. IOP Conference Series: Mater Sci Eng 2018; 299: 012064 - Wulandari, I O; Mardila, V D; Santjojo, D JDH; Sabarudin, A