Cruz, M.M. and Sarmago, R.V. 2001. Synthesis and characterization of YBa2Cu3O7–δ single crystals. Proceedings of the Samahang Pisika ng Pilipinas, 19(1), SPP-2001-PP-16. URL: https://proceedings.spp-online.org/article/view/SPP-2001-PP-16.