1) Converse, J. M.: Kazanjian and Converse's Surgical treatment of facial injuries. 3 Ed., The Williams and Wilkins Company, Baltimore, 1974, p572-577.
2) Naumann, H. H.: Kopf-und Hals-Chirurgie Band 2: Gesichtsschadel, Tell 2 Georg Thieme Verlag, Stuttgart, 1974, p732-733.