Jan M. M. Walboomers, Marcel V. Jacobs, M. Michele Manos, F. Xavier Bosch, J. Alain Kummer, Keerti V. Shah, Peter J. F. Snijders, Julian Peto, Chris J. L. M. Meijer, Nubia Mu�oz,
Human papillomavirus is a necessary cause of invasive cervical cancer worldwide. The Journal of Pathology. ,vol. 189, pp. 12- 19 ,(1999) ,
10.1002/(SICI)1096-9896(199909)189:1<12::AID-PATH431>3.0.CO;2-F