Mathot, M., Lambert, R., Mertens, J., & Toussaint, B. (2003). Effects of nitrogen and sulfur fertilization on grass yield and quality in Belgium. In J.C. Davidian, D. Grill, L.J. Kok, I. Stulen, M.J. Hawkerford, E. Shnug and H. Rennenberg (ed.), Sulfur transport and assimilation in plants (p. p. 279-281). Backhuys Publishers. https://hdl.handle.net/2078.5/151765