1. Pires MC. Acne e Rosácea. In:Dermatologia Para o Clínico (2nd Edition).Sittart JAS, Pires MC (Eds). Lemos Editorial, São Paulo, Brazil 35–42 (1998).
2. Pathogenesis of acne
3. Acne Vulgaris
4. Plewig G, Kligman AH.Acne and Rosacea (3rd Edition).Springer-Verlag, Berlin, Germany 34–649 (2000).