1. Algoazany, A. S., Kalita, P. K., Czapar, G. F., & Mitchell, J. K. (2007). Phosphorus transport through subsurface drainage and surface runoff from a flat watershed in East Central Illinois. USA. J. Environ. Qual., 36, 681–693.
2. Allred, B. J., & Racharaks, R. (2014). Laboratory comparison of four iron-based filter materials for drainage water phosphate treatment. Water Environment Research., 86, 852–862.
3. Arai, Y., & Sparks, D. L. (2007). Phosphate reaction dynamics in soils and soil components: a multiscale approach. In D. L. Sparks (Ed.), Advances in agronomy (Vol. 94, pp. 135–179). San Diego: Academic Press.
4. Beauchamp, K.H. (1987) A history of drainage and drainage methods. In: G. A. Pavelis, editor, Farm drainage in the United States: history, status, and prospects. Miscellaneous Publication Number 1455. U.S. Department of Agriculture—Economic Research Service, Washington, D.C. p. 13–29.
5. Beauchemin, S., Simard, R. R., & Cluis, D. (1998). Forms and concentration of phosphorus in drainage water of twenty-seven tile-drained soils. Journal of Environmental Quality, 27, 721–728.