1. Ackerman AB: Histologic Diagnosis of Inflammatory Skin Diseases, pp. 124, 250. Lea and Febiger, Philadelphia, 1978
2. Psoriasis
3. Canine Seborrheic Disease Complex
4. Lever WF, Schaumberg-Lever G: Histopathology of the Skin, 6th ed., p. 139. J. B. Lippincott. Philadelphia, 1983