1. The causes of cancer: quantitative estimates of avoidable risks of cancer in the United States today;Doll;J. Natl. Cancer Inst.,1981
2. Betel nut and tobacco chewing; potential risk factors of cancer of oesophagus in Assam, India;Phukan;Br. J. Cancer,2001
3. IARC. Tobacco habits other than smoking, IARC Monographs on Betel-quid and Areca-nut Chewing and Some Related Nitrosamines, 37 (1985) 141–200.
4. IARC. Studies of cancer in humans, IARC Monographs on Betel-quid and Areca-nut Chewing and Some Related Nitrosamines, 85 (2004) 80–140.
5. IARC. Smokeless tobacco and some tobacco-specific N-nitrosamines, IARC Monographs on the Evaluation of Carcinogenic Risks to Humans 89 (2007) 167–201.