Benkow, H.L.A New Principle and Appliance for Radiographic Tooth Measurements, J. D. Res., 36:641, 1957.
2.
Fitzgerald, G.M.Dental Roentgenography. I. An Investigation in Adumbration, or the Factors That Control Geometric Unsharpness, J.A.D.A., 34:1, 1947.
3.
McCormack, D.W.A Technical Procedure for Furthering Advancement toward Anatomical Accuracy, J. Calif. State Dental. Assoc. , 13:89, 1937.
4.
Barr, J.H., and Grn, P.Palate Contour as a Limiting Factor in Intra-oral X-ray Technique , Oral Surg., Oral Med., Oral Path., 12:459, 1959.
5.
Broadbent, B.H.A New X-ray Technique and Its Application to Orthodontia, Angle Orthodontist, 1:45, 1931.
6.
Hofrath, H.Die Bedeutung derRontgenfern- und Abstandsaufnahme für die Diagnostik der Kieferanomalien, Fortschr. Orthodontik, 1:232, 1931.
7.
Adams, J.W.Correction of Error in Cephalometric Roentgenograms, Angle Orthodontist, 10:3, 1940.
8.
Beek, J.M., and Linden, F. P. G. M. Van Der.De projectie van hoeken en lijnstukken bij schedelrontgenfoto's met behulp van de groninger cefalostaat en opname techniek., Tijdschr. Tandheelk., 65:565, 1958.