3Okumura M, Hasegawa R, Shirai T, et al. Relationship between calculus formation and carcinogenesis in the urinary bladder of rats administered the non-genotoxic agents thymine or melamine[J]. Carcinogenesis, 1992, 13(6) : 1043- 1045.
4Ogasawara H,Imaida K,Ishiwata H, et al. Urinary bladder carcinogenesis induced by melamine in F344 male rats: correlation between arcinogenicity and urolith formation[J]. Carcinogenesis, 1995, 16 ( 11 ): 2773-2777.
