Are there any aliens out there? We are close to knowing for sure
https://www.newscientist.com/article/mg24332450-800-are-there-any-aliens-out-there-we-are-close-to-knowing-for-sure/
The Beam Balance – Measuring Binary Systems via Relativistic Beaming Signals from Stars and their Companions
https://academic.oup.com/mnras/advance-article-abstract/doi/10.1093/mnras/stz2332/5558252
Nuclear microbomb propulsion for manned deep space exploration with return travel
https://www.sciencedirect.com/science/article/pii/S0094576519306101
Comment on “the ultimate limits of the relativistic rocket equation. The Planck photon rocket”
https://www.sciencedirect.com/science/article/pii/S0094576518317818