References
- 1. Bjork, A. – The Face in Profile. Svensk Tandl-Tidskr. Vol. 40 No. SB, 1947.
- Dewel, B. F. – Second Premolar Extraction in Orthodontics. Am. Jnl. Orth. 41 : 107-120. 1955.
- Lande, M. J. – Growth Behaviours of the Human Bony Facial Profile as revealed by Serial Cephalometric Roentgenology. Angle Orth. 22: 78-90, 1952.
- Nance, Hays N. – The Removal of Second Premolars in Orthodontic Treatment. Am. Jnl Orth. 35: 685-696, 1949.
- Tweed, C. H. – Frankfort Mandibular Incisal Angle in Orthodontic Diagnosis, Classification., Treatment Planning and Proqnosis. Angle Orth., 24: 121-169, 1954.