Kobori; Sato, Ryo; Ashizawa, Yoshio; Yagi, Hiroshi; So, Shigehiro; Arai, Gaku; Okada, Hiroshi (30 Dec 2009). "射精障害患者に対する Masturbator を用いたリハビリテーション" [Rehabilitation for ejaculatory dysfunction with using a masturbator]. The Japanese Journal of Impotence Research (باليابانية). 24 (3): 355–357. Archived from the original on 2017-02-12.
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Kobori; Sato, Ryo; Ashizawa, Yoshio; Yagi, Hiroshi; So, Shigehiro; Arai, Gaku; Okada, Hiroshi (30 Dec 2009). "射精障害患者に対する Masturbator を用いたリハビリテーション" [Rehabilitation for ejaculatory dysfunction with using a masturbator]. The Japanese Journal of Impotence Research (باليابانية). 24 (3): 355–357. Archived from the original on 2017-02-12.