3Mirvish S S.1995.Role of N-nitroso compounds (NOC) and N-nitrosation in etiology of gastric,esophageal,nasopharyngeal and bladder cancer and contribution to cancer of known exposures to NOC[J].Cancer Lett,93(1):17-48.
4Gulis G,Czompolyova M,Cerhan JR.2002,An ecologic study of nitrate in municipal drinking water and cancer incidence in Tmava district,Slovakia [J].Environ Res,88(3):182-187.
5Sandor J,Kiss I,Farkas O,et al.2001,Association between gastric cancer mortality and nitrate content of drinking water:Ecological study on small area inequalities [J].Eur J Epidemiol,17(5):443-447.
6Janos Sandor,Istvan Kiss,Orsolya Farkas,Istvan Ember. Association between gastric cancer mortality and nitrate content of drinking water: Ecological study on small area inequalities[J] 2001,European Journal of Epidemiology(5):443～447
