Schärer, M., Vollmer, T., Frossard, E., Stamm, C., Flühler, H., & Sinaj, S. (2006). Effect of water composition on phosphorus concentration in runoff and water-soluble phosphate in two grassland soils. European Journal of Soil Science, 57(2), 228-234. https://doi.org/10.1111/j.1365-2389.2005.00732.x