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Okazaki, Kazushi, et al. "Dose-dependent Promotion of Rat Forestomach Carcinogenesis by Combined Treatment with Sodium Nitrite and Ascorbic Acid After Initiation with N-methyl- N′-nitro- N-nitrosoguanidine: Possible Contribution of Nitric Oxide-associated Oxidative DNA Damage." Cancer Science 97, no. 3 (2006): 175-182. https://doi.org/10.1111/j.1349-7006.2006.00162.x.

Okazaki, Kazushi, et al. "Dose-dependent Promotion of Rat Forestomach Carcinogenesis by Combined Treatment with Sodium Nitrite and Ascorbic Acid After Initiation with N-methyl- N′-nitro- N-nitrosoguanidine: Possible Contribution of Nitric Oxide-associated Oxidative DNA Damage." Cancer Science, vol. 97, no. 3, 2006, pp. 175-182, https://doi.org/10.1111/j.1349-7006.2006.00162.x.