Lip contribution to facial harmony.

A study of en face photographs of adult Greeks with harmonious faces and Angle Class I occlusion. I. Ioannidou-Marathiotou, D. Spatoulas, A. Kalogiannidis Hellenic Orthodontic Review 1998;1:11-26.
Ελληνική Ορθοδοντική Επιθεώρηση 1998;1:11-26.