https://slinews.com/launch-vehicles/orbital-space-plane-requirements-iss-crew-transport/
Orbital Space Plane Requirements: How NASA Defined ISS Crew Transport and Rescue in 2002 | Space...
How NASA's 2002 requirements for the Orbital Space Plane shaped a generation of crew vehicle designs and reappeared in the Commercial Crew Program.
orbital space planerequirementsnasadefinediss