A. La Kilo, L. Alio, L. O. Aman, and J. La Kilo, “Stability Study of Four Layer Aurivillius Oxide of AxBi4-xTi4O15 (A = Ca, Sr, Ba): Atomistic Simulation”, Acta.Chim.Asiana, vol. 3, no. 2, pp. 157–162, Oct. 2020.