1. Anderson, R.G., 2004. Production and yield of selected edible greens in hydroponic ponds (float beds) in a greenhouse. In: University of Kentucky, Floriculture Research Report 16-04. University of Kentucky, 4p.
2. Hydroponic tulips succeed at second attempt;Armstrong;FlowerTech,2002
3. Forcing hyacinths for winter cut flowers;Armstrong;FlowerTech,2002
4. Bailey, D., Bilderback, T., Bir, D., 1999. Water considerations for container production of plants. In: North Carolina Cooperative Extension Service. Horticulture Information Leaflet 557.
5. Computerized individual nutrient fertilizer injector: the system;Bauerle;HortScience,1988