Zaenglein, Andrea L.; Graber, Emmy M.; Thiboutot, Diane M. (2019), Kang, Sewon; Amagai, Masayuki; Bruckner, Anna L.; Enk, Alexander H. (eds.), "Acne Variants and Acneiform Eruptions", Fitzpatrick's Dermatology (9 ed.), New York, NY: McGraw-Hill Education, retrieved 2022-03-26