1. Boodley, J.W, and Sheldrake Jr, R. (1973). Cornell peat-lite mixes for commercial plant growing. Cornell Univ Plant Sci Inform Bull 43.
2. The ABC of NFT;Cooper,1979
3. Mineral Nutrition of Plants: Principles and Perspectives. page 53;Epstein,2005
4. Equilibrium relationships of metal chelates in hydroponic solutions;Halvorson;Soil Sci. Soc. Amer. Proc,1972
5. Carnation Nutrition;Hartman;Col. Fl. Grow. Ass. Bull,1968