@inproceedings{SPP-2019-1D-03, title={Phase-plane analysis of orbital motion in Schwarzschild-(anti-)de Sitter spacetimes}, volume={37}, booktitle={Proceedings of the Samahang Pisika ng Pilipinas}, author={Elmaguin, John Carlo Narte and Vega, Michael Francis Ian}, year={2019}, pages={SPP-2019-1D-03}, url={https://proceedings.spp-online.org/article/view/SPP-2019-1D-03} }