Benson, James M. & Land, Norman S. An Investigation of Hydrofoils in the NACA Tank 1: Effect of Dihedral and Depth of Submersion, report, September 1942; (https://digital.library.unt.edu/ark:/67531/metadc61720/m1/1/: accessed April 22, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .