Solivan, GA; Smith, KJ; James, WD (1990). «Cutaneous horn of the penis: Its association with squamous cell carcinoma and HPV-16 infection». Journal of the American Academy of Dermatology23 (5 Pt 2): 969-72. PMID2172337. doi:10.1016/0190-9622(90)70315-9.
Wang, W; Wang, C; Xu, S; Chen, C; Tong, X; Liang, Y; Dong, X; Lei, Y et al. (2007). «Detection of HPV-2 and identification of novel mutations by whole genome sequencing from biopsies of two patients with multiple cutaneous horns». Journal of Clinical Virology39 (1): 34-42. PMID17368088. doi:10.1016/j.jcv.2007.01.002.Se sugiere usar |número-autores= (ayuda)
Solivan, GA; Smith, KJ; James, WD (1990). «Cutaneous horn of the penis: Its association with squamous cell carcinoma and HPV-16 infection». Journal of the American Academy of Dermatology23 (5 Pt 2): 969-72. PMID2172337. doi:10.1016/0190-9622(90)70315-9.
Wang, W; Wang, C; Xu, S; Chen, C; Tong, X; Liang, Y; Dong, X; Lei, Y et al. (2007). «Detection of HPV-2 and identification of novel mutations by whole genome sequencing from biopsies of two patients with multiple cutaneous horns». Journal of Clinical Virology39 (1): 34-42. PMID17368088. doi:10.1016/j.jcv.2007.01.002.Se sugiere usar |número-autores= (ayuda)