5Al-Bdour M, Al-Latayfeh MM. Risk factors for pterygium in an adult Jordanian population. Acta Ophthalmol Scand, 2004, 82: 64-67.
6Gazzard G, Saw S-M, Farook M, et al. Pterygium in Indonesia:prevalence, severity and risk factors. Br J Ophthalmol , 2002, 86:1341-1346.
7Gallagher MJ, Giannoudis A, Herrington CS, et al. Human papillomavirus in pterygium. Br J Ophthalmol ,2001, 85:782-784.
8Piras F, Moore PS, Ugalde J, et al. Detection of human papillomavirus DNA in pterygia from different geographical regions. Br J Ophthalmol, 2003, 87:864-866.
9Chen KH, Hsu WM, Cheng CC, et al. Lack of human papillomavirus in pterygium of Chinese patients from Taiwan. Br J Ophthalmol,2003, 87:1064-1066.
10Islam SI. Wagoner MD. Pterygium in young members of one family. Cornea,2001, 20:708-710.
