1. Austin HW: Perioral rejuvenation. In: Cohen M (ed): Mastery on Plastic and Reconstructive Surgery, Vol. III. Boston: Little, Brown, 1994
2. Cardoso AD, Sperli AE: Rhytidoplasty of the upper lip. In: Hueston JT (ed): Transactions of the Vth International Congress of the IPRS. Melbourne: Butterworth, 1971
3. De la Plaza R: Cirugiá del rejuvenecimiento de los dos tercios superiores de la cara. VIIth Congreso Iberolatinoamericano de Cirugiá Plástica, Cartagena, Colombia, 1988, p 136
4. De la Plaza R, De la Cruz L: Can some facial rejuvenation techniques cause iatrogenia? Aesth Plast Surg 18:205, 1994
5. Delerm A, Elbaz JS: Cheiloplastie des lévres minces. Proposition d'une technique. Ann Chir Plast 20:243, 1975