Asakura, A. ; Nishihama, S. (1987). Studies on the Biology and Ecology of the Intertidal Animals of Chichijima Island in the
Ogasawara (Bonin )Islands− III. Description, Form and Habitat of the Trochid Snail,
Monodonta perplexa boninensis n. subsp. in Comparison with those in Monodonta perplexa perplexa (Pilsbry). VENUS (The Japanese Journals of Malacology). 46(4): 194 − 201.
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Asakura, A. ; Nishihama, S.
1987
Studies on the Biology and Ecology of the Intertidal Animals of Chichijima Island in the
Ogasawara (Bonin )Islands− III. Description, Form and Habitat of the Trochid Snail,
Monodonta perplexa boninensis n. subsp. in Comparison with those in Monodonta perplexa perplexa (Pilsbry)