Udvardi, M. K. Molecular Plant Nutrition, Max Planck Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society;
Howitt, S. M., & Udvardi, M. K. (2000). Structure, function and regulation of ammonium transporters in plants. Biochimica Et Biophysica Acta-Biomembranes, 1465(1-2), 152-170. doi:10.1016/S0005-2736(00)00136-X.