^Freedberg, et al. (2003). Fitzpatrick's Dermatology in General Medicine. (6th ed.). McGraw-Hill. ISBN0-07-138076-0.
Further reading
Trüeb, Ralph M.; Dias, Maria Fernanda Reis Gavazzoni (2018). "Alopecia Areata: a Comprehensive Review of Pathogenesis and Management". Clinical Reviews in Allergy & Immunology. 54 (1): 68–87. doi:10.1007/s12016-017-8620-9. ISSN1080-0549.