de Yro, P.A.N., Manauis, M.B. and Sarmago, R.V. 2001. An x-ray diffraction and SEM study of the effect of excess CaCO3, CaO and CuO on the stability of Bi-2212 phase. Proceedings of the Samahang Pisika ng Pilipinas, 19(1), SPP-2001-W2C-6. URL: https://proceedings.spp-online.org/article/view/SPP-2001-W2C-6.