1. An Introduction to Clinical Orbitonometry;Copper,1948
2. The measurement of the retrobulbar resistance (orbitonometry) in the clinic;Copper;Tr. Ophth. Soc. U. Kingdom,1950
3. Clinical orbitonometry;Means;Am. J. M. Sci.,1950
4. Clinical orbitonometry in Graves' disease;Kearns;Am. J. Ophth,1953
5. Clinical use of orbitonometry;Grossman;Am. J. Ophth.,1954