Yoshiwara, S. 1897. On two new species of Asthenosoma from the Sea of Sagami. Annotationes Zoologicae Japonenses 1: 5–11 pl. 2
Yoshiwara, S. 1898. Preliminary notice of new Japanese echinoids. Annotationes Zoologicae Japonenses 2(2): 57–61
Yoshiwara, S. 1897. On two new species of Asthenosoma from the Sea of Sagami. Annotationes Zoologicae Japonenses 1: 5–11 pl. 2
Yoshiwara, S. 1898. Preliminary notice of new Japanese echinoids. Annotationes Zoologicae Japonenses 2(2): 57–61