Richard H. C. Zegers: The Eyes of Johann Sebastian Bach. In: Archives of Ophthalmology. Band 123, Nr. 10, 2005, S. 1427–1430, doi:10.1001/archopht.123.10.1427.
nih.gov
ncbi.nlm.nih.gov
M. A. Isawumi, O. U. Kolawole, and M. B. Hassan: Couching Techniques for Cataract Treatment in Osogbo, South West Nigeria. In: Ghana Medical Journal, Bd. 47, Nr. 2 (Juni 2013), S. 64–69 (PMC 3743109 (freier Volltext)).
uiowa.edu
webeye.ophth.uiowa.edu
Insuccessful couching auf der Website der University of Iowa Health Care Ophthalmology & Visual Sciences
