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books.google.com
Agatsuma, Yukio (2007). "Ecology of Hemicentrotus pulcherrimus, Pseodocentrotus depressus, and Anthocidaris crassispina". In Lawrence, John M. (ed.). Edible Sea Urchins: Biology and Ecology. Developments in Aquaculture and Fisheries Science. Vol. 38 (2nd ed.). Elsevier. pp. 459–472. ISBN9780080465586.
Agatsuma, Yukio; Yamada, Hirokazu; Taniguchi, Kazuya (2006). "Distribution of the sea urchin Hemicentrotus pulcherrimus along a shallow bathymetric gradient in Onagawa Bay in northern Honshu, Japan". Journal of Shellfish Research. 25 (3): 1027–1036. doi:10.2983/0730-8000(2006)25[1027:DOTSUH]2.0.CO;2.