S. Mazen, N. I. Abu-Elsaad, A. S. Nawara, “The influence of various divalent metal ions (Mn$^{2+}$, Co$^{2+}$, and Cu$^{2+}$) substitution on the structural and magnetic properties of nickel-zinc spinel ferrite”, Физика твердого тела, 62:7 (2020), 1054; Phys. Solid State, 62:7 (2020), 1183–1194
