^Owen, R., 1850, Description of the Fossil Reptiles of the Chalk Formation.
^E. D. Cope. 1869. On the reptilian orders Pythonomorpha and Streptosauria. Proceedings of the Boston Society of Natural History 12:251-266
^Lydekker., R., 1889, Catalogue of the fossil Reptilia and Amphibia in the British Museum (Natural History). Part II. Containing the orders Ichthyopterygia and Sauropterygia: London, Printed by Order of the Trustees of the British Museum, p. 307pp.
^Welles, S. P., 1962, A new Species of Elasmosaur from the Aptian of Colombia and a review of the Cretaceous Plesiosaurs: University of California Publications Bulletin Department of Geological Sciences, v. 44, p. 1-89.
^Perrson, P. O., 1963, A revision of the classification of the Plesiosauria with a synopsis of the Stratigraphical and geographical distribution of the Group: Lunds Universitets Arksskrift. N. F. Avd. 2, band 59, n 1, p. 60.