كمال محمود عفيصه, محمد ياسين صبيح, and شوكت شاهين شاهين, “A Study on Structural, Mechanical, Speed and Frequency Properties of the Ultrasonic Generated by the Compression Component {\mathbf{Co}}_\mathbf{x}{\mathbf{Ni}}_{\mathbf{1}-\mathbf{x}}{\mathbf{Fe}}_\mathbf{2}\mathbf{O}_\mathbf{4} at ratios x = (0.0, 1.0)”, TUJ-BA, vol. 42, no. 5, Dec. 2020.