3Edwards S,Carne C.Oral Sex and the transmission of viral STIs[J]. Sex.Transm.Inf. 1998.74:6-10.
4Page-Shafer K, Shiboski CH,Osmond DH,et al.Risk of HIV infection attributable to oral sex among men who have sex with men and in the population of men who have sex with men[J].AIDS,2002,16 (17):2350-52.
5Temin MJ,et all.Perceptions of Sexual behavior and knowledge about sexually transmitted diseases among adolescents in Beinin city[J].Nigerial International Family Planning perspectives, 1999, 25(1):186-190.