1. Facts & figures 2008;American Cancer Society,2008
2. Urinary bladder cancer and the petroleum industry: a quantitative review;Baena;European Journal of Cancer Prevention,2006
3. Cancer pattern and risk factors in the African population South Western Zimbabwe;Parkin;Cancer Epidemiology, Biomarkers and Prevention,1994
4. Foundations of epidemiology;Lilienfeld,1980
5. Bladder cancer: a current update;Masood;Hospital Medicine,2003