PDF] Staged Combustion Cycle Rocket Engine Design Trade-Offs for Future Advanced Passenger Transport | Semantic Scholar
Space Propulsion: Separating Fact From Science Fiction | Hackaday
Air-breathing rocket engines: the future of space flight – Physics World
Why the Aerospike Engine Is the Future of Rockets and Spaceflight
A new era of spaceflight? Promising advances in rocket propulsion
Air-Breathing Rocket Engine Promises Future Space Planes | Hackaday
ISRO upcoming engine sce-200 will power their future rocket and reusable vehicles. (similar in strength to raptor and uses a Oxygen rich closed cycle and kerelox) : r/space
The Efficient Future of Deep-Space Travel--Electric Rockets - Scientific American
To The Moon And Back, Aerojet Wants To Power Future Cislunar Economy | Aviation Week Network
NASA, DARPA Will Test Nuclear Engine for Future Mars Missions | NASA