S. K. Saraf, Anju Katiyar, and S.S. Kushwaha, Rekha Trivedi. “Phonon Dispersion in Superlattices through : A New Method”. Journal of International Academy of Physical Sciences 3, no. 1-4 (December 15, 1999): 53–56. Accessed May 7, 2025. https://www.iaps.org.in/journal/index.php/journaliaps/article/view/715.