1. Geschichte der Augenheilkunde (2. Aufl. BD. 15) Handbuch der gesamten Augenheilkunde;Hirschberg,1918
2. Ophthalmologists: the earnings edge gets smaller;Owens;Medical Economics,1983
3. The Impact of Subspecialty Fellowship Training on Residency Education, Proceedings of the AUPO Conference, Laguna Niguel, California, February 1988;Straatsma,1988
4. Ophthalmology Practice Study Report: Final report, April 1979;Mendenhall,1979