Grant, R. E. (1995). Upper Permian brachiopods of the Superfamily Orthotetoidea from Hydra Island, Greece. <em>Journal of Paleontology.</em> 69(4): 655-670.[details] Available for editors
original descriptionGrant, R. E. (1995). Upper Permian brachiopods of the Superfamily Orthotetoidea from Hydra Island, Greece. <em>Journal of Paleontology.</em> 69(4): 655-670.[details] Available for editors