BioStor
 | Reports on the Cephalopoda W E Hoyle (1904) Bulletin of The Museum of Comparative Zoology, Harvard 43: 1-71 |
 | Über Cephalopoden der Deutschen Tiefsee-Expedition C Chun (1908) Zoologischer Anzeiger 33: 86-89 |
 | Light production in cephalopods. 1. An introductory survey S S Berry (1920) Biological Bulletin. Marine Biological Laboratory (Woods Hole) 38: 141-169 |
 | LIGHT PRODUCTION IN CEPHALOPODS, II: AN INTRODUCTORY SURVEY S Stillman Berry (1920) Biol Bull 38: 171-195 |
 | The identification of cephalopod "beaks" and the relationship between beak size and total body weight Malcolm R Clarke (1962) Bulletin of the British Museum (Natural History). Zoology 8(10): 419-480 |