المؤلفون: Miwa, Hirohisa, Maekawa, Kouichi, Matsuura, Takao, Murayama, Akihiro, Saeki, Noriyuki, Shinozaki, Nobuaki, Watanabe, Kazunao

المصدر: Nihon Kyukyu Igakukai Zasshi ; volume 3, issue 2, page 73-77 ; ISSN 1883-3772 0915-924X

الاتاحة: http://dx.doi.org/10.3893/jjaam.3.73