La biodiversidad en Veracruz : estudio de estado - Cruz Angón, Andrea (Comisión Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO), 2011)

Bulletin - United States National Museum (G.P.O, 1968)

Bulletin du Muséum national d'histoire naturelle Section A Zoologie, biologie et écologie animales - Muséum national d'histoire naturelle (France) (Muséum national d'histoire naturelle, 1984)

A catalogue of the recent sea-urchins (Echinoidea) in the collection of the British Museum (Natural History) - Clark, Hubert Lyman, 1870 -1947 (Printed by order of the Trustees of the Museum, 1925)

Fishery bulletin. United States Fish and Wildlife Service - U.S. Fish; Wildlife Service (The Service, U.S. Govt Print. Off, 1954)

Hawaiian and other Pacific Echini / by Alexander Agassiz and Hubert Lyman Clark - Agassiz, Alexander, 1835 -1910 (Printed for the Museum, 1917)

Hawaiian and other Pacific Echini / by Alexander Agassiz and Hubert Lyman Clark - Agassiz, Alexander, 1835 -1910 (Printed for the Museum, 1917)

Hawaiian and other Pacific Echini / by Alexander Agassiz and Hubert Lyman Clark - Agassiz, Alexander, 1835 -1910 (Printed for the Museum, 1917)