“STUDY OF THE MAGNETIC PROPERTIES OF POROUS POLYSTYRENE NANOPARTICLES LOADED WITH MAGNETITE”. Revista Peruana De Química E Ingeniería Química, vol. 15, no. 2, Dec. 2012, pp. 5-12, https://revistasinvestigacion.unmsm.edu.pe/index.php/quim/article/view/4786.