Frank, R. and Rau, H. 1990. Photochemical transformation...of ... EDTA. Ecotoxicology and Environmental Safety 19: 55 to 63. Lockhart, H. B. and Blakely, R.v. 1975. Aerobic photodegradation of ... Ferric EDTA. Environmental Science and Technology 12: 1035 to 1038.