1. References to studies included in this review
2. Blec87 {published data only}
3. Treatment of papulo-pustular acne- comparison of the efficacy and tolerance of minocycline and oxytetracycline [German];Blechschmidt;Munchener Medizinische Wochenschrift,1987
4. Cull76 {published data only}
5. Minocycline therapy in acne vulgaris;Cullen;Cutis,1976