McDearmon, Russell W. & Heinke, Harry S., Jr. Investigations of the damping in roll of swept and tapered wings at supersonic speeds, report, March 3, 1953; (https://digital.library.unt.edu/ark:/67531/metadc59536/m1/3/: accessed May 25, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .