D. J. Parekh, D. . K. Thummar, N. . S. Kanani, N. H. Vasoya, and K. B. Modi, “First study on lattice potential energy determination from ultrasonic mean sound velocity for polycrystalline Ca1+xCu3-xTi4O12 perovskites and mono-crystalline counterparts”, J Theor Appl phys, vol. 19, no. 2, pp. 1–10, Apr. 2025, doi: 10.57647/j.jtap.2025.1902.19.