Lambert, R., Mathot, M., & Toussaint, B. (2003). Grass sulfur and non-protein nitrogen accumulation : a preview in the southeastern part of Belgium. In J.C. Davidian, D. Grill, L.J. Kok, I. Stulen, M.J. Hawkesford, E. Shnug and H. Rennenberg (ed.), Sulfur transport and assimilation in plants (p. p. 257-259). Backhuys Publishers. https://hdl.handle.net/2078.5/150320