Z. Zulhadjri, B. Prijamboedi, A. A. Nugroho, N. Mufti, and I. Ismu, “Five Layers Aurivillius Phases Pb2-xBi4+xTi5-xMnxO18: Synthesis, Structure, Relaxor Ferroelectric and Magnetic Properties”, J. Math. Fund. Sci., vol. 43, no. 2, pp. 139-150, Jul. 2013.