Zaphiropoulos PG, Undén AB, Rahnama F, Hollingsworth RE, Toftgård R (1999). "PTCH2, a novel human patched gene, undergoing alternative splicing and up-regulated in basal cell carcinomas". Cancer Research. 59 (4): 787–92. PMID10029063.
Evans, D. G.; Farndon, P. A.; Adam, M. P.; Ardinger, H. H.; Pagon, R. A.; Wallace, S. E.; Bean LJH; Stephens, K.; Amemiya, A. (1993). "Nevoid Basal Cell Carcinoma Syndrome". PMID20301330. {{cite journal}}: Cite journal requires |journal= (help)
Li TJ, Sun LS, Luo HY, Yuan JW, Gao L, Gu XM, Li XF, Xu LL (2009). "Studies on keratocystic odontogenic tumors". Beijing da Xue Xue Bao. Yi Xue Ban = Journal of Peking University. Health Sciences. 41 (1): 16–20. PMID19221557.
Fan Z, Du J, Liu H, Zhang H, Dlugosz AA, Wang CY, Fan M, Shen Y, Wang S (2009). "A susceptibility locus on 1p32-1p34 for congenital macrostomia in a Chinese family and identification of a novel PTCH2 mutation". American Journal of Medical Genetics Part A. 149A (3): 521–4. doi:10.1002/ajmg.a.32647. PMID19208383.