Adamchak, S. E. (2006). Youth peer education in reproductive health and HIV/AIDS: Progress, process, and programming for the future. URL (last checked 12 August 2012). http://archive.k4health.org/system/files/Peer%20Education%20Overview.pdf
 Agreement between the Government, the Regions and the Independent Provinces of Trento and Bolzano Concerning (2007). Strategies for active offer of the vaccination against infection from HPV in Italy. URL (last control 12 August 2012). www.statoregioni.it/Documenti/DOC_016696_264%20csr.pdf
 Bartolozzi, G., Bona, G., Ciofi, M., De Martino, M., Di Pietro, P., Duse, M. et al. (2007). Human papillomavirus vaccination. Consensus Conference in pediatric age. Minerva Pediatrica, 59, 165-182.
 Chan, S. S. C., Yan Ng, B. H., Lo, W. K., Cheung, T. H., & Hung Chung, T. K. (2009) Adolescent girls’ attitudes on human papillomavirus vaccination. Journal of Pediatric and Adolescent Gynecology, 22, 85-90. doi:10.1016/j.jpag.2007.12.007
 Derzon, J. H., Sale, E., Springer, J. F., & Brounstein, P. (2005) Estimating intervention effectiveness: Synthetic projection of field evaluation results. The Journal of Primary Prevention, 26, 321-343. doi:10.1007/s10935-005-5391-5
 Di Giuseppe, G., Abbate, R., Liguori, G., Albano, L., & Angelillo, I. F. (2008). Human papillomavirus and vaccination: knowledge, attitudes, and behavioural intention in adolescents and behavioural intention in adolescents and young women in Italy. British Journal of Cancer, 99, 225-229.
 Do, Y. K., & Wong, K. I. (2012). Awareness and acceptability of human papillomavirus vaccine: An application of the instrumental variables bivariate probit model. BMC Public Health, 12, 31. doi:10.1186/1471-2458-12-31
 Ferrara, M., Gentile, A., Merzagora, L., Tucci S., De Vito, E., Langiano, E., & Ricciardi G. (2004). The prevention of synthetic drugs: Survey on knowledge of synthetic drugs in a sample of students from the Secondary School specialising in Scientific Studies, of Cassino. Educazione Sanitaria e Promozione della Salute, 27, 108-117.
 Ferrara, M., Langiano, E., & De Vito, E. (2012). A school based community randomized trial of the effect of peer health education on primary prevention knowledge, attitude and behaviours towards HPV among adolescents. Italian Journal of Public Health, 9, 20-32.
 Ferrara, M., Langiano, E., Di Thiene, D., & De Vito, E. (2010). The project “D.E.A.Th. by Eros to Thanatos AIDS and sexually transmitted diseases”. A multimedia exhibitions a means of prevention of sexually transmitted infections. Italian Journal of Public Health, 7, 268-276.
 Friedman, L. S., Kahn, J., Middleman, A. B., Rosenthal, S. L., & Zimet G. D. (2006). Human papillomavirus (HPV) vaccine: A position statement of the Society for Adolescent Medicine. Journal of Adolescent Health, 39, 620. doi:10.1016/j.jadohealth.2006.07.013
 Hoffman, B. R., Sussman, S., Unger, J. B., & Valente W. T. (2006). Peer influences on adolescent cigarette smoking: A theoretical review of the literature. Substance Use & Misuse, 41, 103-155. doi:10.1080/10826080500368892
 Kenneth, F., Schulz, K., F., Altman, D. G., Moher, D., & CONSORT Group (2010). CONSORT 2010 statement: Updated guidelines for reporting parallel group randomised trials. Italian Journal of Public Health, 7, 327-332.
 La Torre, G., De Vito, E., Martellucci, L., Langiano, E., & Ricciardi, G. (2002). Knowledge, attitudes, and practices regarding sexually transmitted diseases among students in three high schools in Cassino. Annali di Igiene, 14, 233-242.
 La Torre, G., De Vito, E., Capelli, G., Langiano, E., Ferrara, M., & Ricciardi, G. (2003). Knowledge and attitudes of principals and school teachers in the province of Frosinone in the health education. Educazione Sanitaria e Promozione della Salute, 26, 290-297.
 Louvanto, K., Rintala, M. A., Syrj?nen, K. J., Grénman, S. E., & Syrj?nen, S. M. (2011). Incident cervical infections with high- and low-risk human papillomavirus (HPV) infections among mothers in the prospective Finnish Family HPV Study. BMC Infectious Diseases, 11, 179. doi:10.1186/1471-2334-11-179
 Massini, S., Marona, R., Di Pinto, G. H., & Saulle, R. (2010) “Facoltà d’Amarsi”: When young people try to change the situation. Youth project as a tool for health communication and STD prevention. Italian Journal of Public Health, 7, 277-291.
 Piana, A., Sotgiu, G., Castiglia, P., Pischedda, S., Cocuzza, C., Capobianco, G. et al. (2011). Prevalence and type distribution of human papillomavirus infection in women from North Sardinia, Italy. BMC Public Health, 11, 785. doi:10.1186/1471-2458-11-785
 Pieralli, A., Fallani, M. G., Lozza, V., Corioni, S., Longinotti, M., Fambrini, M., & Penna, C. (2011). Age-specific distribution of Human Papilloma Virus (HPV) mucosal infection among young females. Open Journal of Obstetrics and Gynecology, 1, 104-108. doi:10.4236/ojog.2011.13018
 Sopracordevole, F., Cigolot, F., Lucia, E., & Marchesoni, D. (2009) Knowledge on human papilloma virus (HPV) related genital lesions and vaccination against HPV in a sample of women of north-east Italy. Minerva Ginecologica, 61, 81-87.
 Supporting Community Action on AIDS in Developing Countries (2006). Peer education: Outreach, communication & negotiation. Training Module. URL (last check 12 August 2012). http://www.aidsallianceindia.net/Material_Upload/document/Peer_education_manual.pdf
 United Nations Population Fund (UNFPA) and Family Health International (FHI) (2005). Training of trainers manual. Youth peer education toolkit. New York and Arlington, VA: UNFPA and FHI. URL (last checked 12 August 2012). http://184.108.40.206/c/document_library/get_file?p_l_id=33873&folderId=36046&name=DLFE-406.pdf
 World Health Organization (2007). Global strategy for the prevention and control of sexually transmitted infections: 2006-2015: Breaking the chain of transmission. URL (last checked 12 August 2012). http://whqlibdoc.who.int/publications/2007/9789241563475_eng.pdf
 World Health Organization (2006). Preparing for the introduction of HPV vaccines: Policy and programme guidance for countries. URL (last checked 12 August 2012). http://whqlibdoc.who.int/hq/2006/WHO_RHR_06.11_eng.pdf young