1. Albano, J.P., Miller, W.B., 1993. Iron distribution and the occurrence of a physiological disorder in marigold. HortScience 28, 550, abstract.
2. Iron toxicity stress causes bronze speckle, a specific physiological disorder of Marigold (Tagates erecta L.);Albano;J. Am. Soc. Hort. Sci.,1996
3. Biernbaum, J.A., Carlson, W.H., Shoemaker, C.A., Heins, R., 1988. Low pH causes iron and manganese toxicity. Greenhouse Grower 6 (3), 92–93, 96–97.
4. Prevention of stress in iron metabolism of plants;Bienfait;Acta Bot. Neerl.,1989
5. Formation of root plaques and their influence on tissue phosphorus content in Lobelia dortmanna;Christensen;Aquat. Bot.,1998