参考文献

Hijiya, Toyoto; Yamashita, Keizo; Kojima, Mitsuhiko; Uchida, Yumiko; Katayama, Satoshi; Torii, Takayoshi; Shiragami, Hiroshi; Izawa, Kunisuke Nucleosides and Nucleotides, 1999 , vol. 18, # 4-5 p. 653 - 654