Nadjafikhah *, Mehdi, and Leila Hamedi Mobarra. “Majors About the New Symmetry of a Nonlinear Acoustics Model: New Symmetry”. Hyperscience International Journal 2, no. 1 (March 10, 2022): 1–6. Accessed February 29, 2024. https://hscience.org/index.php/hij/article/view/11.