1Lapatki BG, Mager AS, Schuhe-Moenting J, et al. The importance of the level of the lip line and restiong lip pressure in Class II,Division 2 Malocclusion.J Dent Res 81 (5):323-328,2002.
3Brezniak N, Arad A, Heller M, et al. Pathognomonic Cephalometric Characteristics of Angle Class I! Division 2 Malocclusion. Angle Orthodontist, 72, 2002:251-257.