1. Retroplacement for strabismus;Berens;Am. J. Ophth.,1920
2. Retroplacement of the inferior oblique at its scleral insertion;Berens;Am. J. Ophth.,1952
3. Late results of operations for separation of the retina;Berens;Surg. Gyn. & Obstet.,1940
4. Berens, C., Sheppard, L. B., and Duel, A. B., Jr.: The surgery of glaucoma: Cycloelectrolysis versus cyclodiathermy. Acta XVI Concilium Ophthalmologicum (Britannia), 1950.