G. A. Hazelhurst
Hazelhurst G. A. and Rayner J. M. V., 1992, An unusual flight mechanism in the Pterosauria, Paleontology, 34(4): 927-941.
Hazelhurst G. A. and Rayner J. M. V., 1992, Flight characteristics of Triassic and Jurassic Pterosauria, an appraisal based on wing shape. Paleobiology, 18; pp. 447-463.