1. A Rational Articulator;Christensen;Ash's Quarterly Circular,1901
2. The Facial Line of Angles in Prosthetic Dentistry;Walker;D. Cosmos,1897
3. Kjeveleddsvinkelens Forhold ved Bittforandringer pa˚Kraniet og i Artikulator, og Dets Betydning for “the Check-bite”;Christensen;Odont. Tidsskr.,1948
4. The Scientific Articulation of the Human Teeth as Founded on Geometrical, Mathematical, and Mechanical Laws;Bonwill;D. Item Int.,1899
5. The Scientific Articulation of the Human Teeth as Founded on Geometrical, Mathematical, and Mechanical Laws;Bonwill;D. Item Int.,1899