Underwood, M. C. (2017). Concept of operations for integrating commercial supersonic transport aircraft into the National Airspace System / Matthew C. Underwood: Matthew C. Underwood. Hampton, Virginia: National Aeronautics and Space Administration, Langley Research Center.

Underwood, Matthew C.. Concept of Operations for Integrating Commercial Supersonic Transport Aircraft Into the National Airspace System / Matthew C. Underwood: Matthew C. Underwood. Hampton, Virginia: National Aeronautics and Space Administration, Langley Research Center, 2017.

Underwood, Matthew C.. Concept of Operations for Integrating Commercial Supersonic Transport Aircraft Into the National Airspace System / Matthew C. Underwood: Matthew C. Underwood. Hampton, Virginia: National Aeronautics and Space Administration, Langley Research Center, 2017.