Heinz A. Kollmann and Helmuth Zapfe, 1.1 Tethys—the Evolution of an Idea, in: New Aspects on Tethyan Cretaceous Fossil Assemblages, Springer-Verlag reprint ed. 1992 ISBN 978-0387865553 - Google books
Edward Suess (March 1893) "Are ocean depths permanent?,"Natural Science: A Monthly Review of Scientific Progress (London), 2 : 180- 187. From page 183: "This ocean we designate by the name "Tethys," after the sister and consort of Oceanus. The latest successor of the Tethyan Sea is the present Mediterranean."
