عفيصه ك. م. ., صبيح م. ي. ., and شاهين ش. ش. ., “A Study on Structural, Mechanical, Speed and Frequency Properties of the Ultrasonic Generated by the Compression Component 〖Co〗_x 〖Ni〗_(1-x) 〖Fe〗_2 O_4 at ratios x = (0.0, 1.0)”, TUJ-BA, vol. 42, no. 5, Dec. 2020.