dela Cruz, A.P.C., de la Cruz, C.R. and Sarmago, R.V. 2002. Hall voltage sign reversal in Bi2Sr2CaCu2O8+δ thin film. Proceedings of the Samahang Pisika ng Pilipinas, 20(1), SPP-2002-2D-01. URL: https://proceedings.spp-online.org/article/view/SPP-2002-2D-01.