5 ms·https://arxiv.org/abs/gr-qc/9704009 https://arxiv.org/abs/gr-qc/9704009 p2 (fig1) is pretty niceby hyporthogon 10y agohttps://arxiv.org/abs/gr-qc/9704009 https://arxiv.org/abs/gr-qc/9704009 p2 (fig1) is pretty nice