1. Changes in facial profile after surgical treatment of mandibular protrusion;Björk;Scand. J. Plast. Reconstr. Surg.,1971
2. Soft tissue profile change produced by reduction of mandibular prognathism;Robinson;Angle Orthod.,1922
3. The soft tissue facial profile before and after surgical correction of mandibular protrusion;Fromm;Acta Odontol. Scand.,1972
4. Cephalometric prediction of the soft tissue profile following anterior maxillary osteotomy;Harris,1973
5. Soft tissue changes in relationship to movement of hard structures in orthognathic surgery: A preliminary report;Lines;J. Oral Surg.,1974