AMEMIYA, S. Development of echinothurioid sea urchin Asthenosoma ijimai. Mar Biol. 1979, 52, 93-96
AMEMIYA, S. Studies on the echinothurioid echinoid, Asthenosoma sp. collected around Ryukyu Islands. Updated Progress in Aquatic Inverteberate Zoology. 1999, 273-288