Palpal-latoc, C.J.B. and Vega, M.F.I.G. 2020. Cosmic evolution with delay differential equations. Proceedings of the Samahang Pisika ng Pilipinas, 38(1), SPP-2020-2G-06. URL: https://proceedings.spp-online.org/article/view/SPP-2020-2G-06.