Naz, S., M. Shahzad, A. H. Qureshi, H. Waqas, N. Hussain, K. Saeed, and L. Ali. “INVESTIGATION OF PHASES DEVELOPED IN Bi4Ti3O12 SYSTEM BY THERMAL AND ANALYTICAL TECHNIQUES”. The Nucleus, vol. 48, no. 2, May 2011, pp. 101-6, http://www.thenucleuspak.org.pk/index.php/Nucleus/article/view/845.