1. Comprehensive cervical cancer control: a guide to essential practice;WHO,2006
2. Chapter 3: HPV type-distribution in women with and without cervical neoplastic diseases;Clifford;Vaccine,2006
3. Human Papillomavirus (HPV) Vaccine Background Paper;WHO,2008
4. WHO position paper on human papillomavirus vaccines, Weekly Epidemiological Record;WHO,2009
5. Report of the meeting on HPV Vaccine Coverage and Impact Monitoring;WHO,2010