Anh, Luong Thi Quynh, et al. “Low-Temperature Synthesis of Superparamagnetic Zn0.8Ni0.2Fe2O4 Ferrite Nanoparticles”. <i>Vietnam Journal of Science and Technology</i>, vol. 56, no. 1, Jan. 2018, pp. 31-38, doi:10.15625/2525-2518/56/1/9805.