Mohammed Salih Hussien, M., ممتاز, abeer bader, and عبیر. “Enhancement Efficiency of Calculation of the Phonon Images for GaP Piezoelectric Crystal”. Journal of Education and Science (JES), vol. 31, no. 1, Mar. 2022, pp. 137-46, doi:10.33899/edusj.2022.131963.1195.