Frey, E., Buchy, M.-C., and Martill, D. M., 2003, Middle- and bottom-decker Cretaceous pterosaurs: unique designs in active flying vertebrates: In: Evolution and Palaeobiology of Pterosaurs, edited by Buffetaut, E., and Mazin, J.-M., Geological Society Special Publication, no.217, p.267-274.
Frey, E., Martill, D. M., and Buchy, C.-C., 2003, A new crested ornithocheirid from the Lower Cretaceous of northeastern Brazil and the unusual death of an unusual pterosaur: In: Evolution and Palaeobiology of Pterosaurs, edited by Buffetaut, E., and Mazin, J.-M., Geological Society Special Publication, no.217, p.55-63. (Ludodactylus sibbicki)
Frey, E., Martill, D., M., and Buchy, C. C., 2003, A new species of tapejarid pterosaur with soft tissue head crest: In: Evolution and Palaeobiology of Pterosaurs, edited by Buffetaut, E., and Mazin, J.-M., Geological Society Special Publication, no.217, p.65-72. (Tapejara navigans)