M. Hussien, Mumtaz, and Manal A. Khalil. “A New Algorithem for Calculating the Phonon Imaging for Orthorhombic Crystals”. Rafidain Journal of Science 23, no. 8 (December 1, 2012): 158–171. Accessed September 28, 2025. https://jamh.uomosul.edu.iq/index.php/rsci/article/view/46748.