James A. Jensen
A U.S. Palaeontologist and the discoverer of Supersaurus in 1972 and Ultrasaurus in 1979
Jensen J. A., 1975, Continuing Study of new Jurassic/Cretaceous Vertebrate faunas from Colorado and Utah, National Geographic Research Reports, 1975, pp. 373-381.
Jensen J. A. and Padian K., 1989, Small pterosaurs and dinosaurs from the Uncompahgre fauna (Brushy Basin Member, Morrison Formation: ?Tithonian), late Jurassic, western Colorado.J. Paleont. 63, 363–374.
Jensen J. A. and Ostrom J. H., 1997, a second Jurassic Pterosaur from North America, Journal of paleontology, 51(4): 867-870.