1. Gangrene and pyoderma of the scalp; An unusual complication of hair autograft technique;Pearlstein;Cutis,1971
2. Granulomatous reaction to autologous hairs incarcerated during hair transplantation;Altchek;J. Dermatol. Surg. Oncol.,1978
3. Pyogenic granuloma;McGeoch;Aust. J. Dermatol.,1961
4. Pyogenic granuloma. Clinical features, incidence, histology and result of treatment: report of 242 cases;Bhaskar;J. Oral Surg.,1966