Nazario, M.A. and Saloma, C. 1995. Spectral recovery in crossing-based spectrum analysis by analytic continuation: Minimum negativity constraint. Proceedings of the Samahang Pisika ng Pilipinas, 13(1), SPP-1995-IP-01. URL: https://proceedings.spp-online.org/article/view/SPP-1995-IP-01.