Caroline E. Shepherd

Predicting post-anthesis N requirements of bread wheat with a Minolta SPAD meter

Peter B. Barraclough, P. Barraclough, R. López-Bellido, 2004 .

Co-ordinated expression of amino acid metabolism in response to N and S deficiency during wheat grain filling.

Malcolm J. Hawkesford, Jane L. Ward, Paul J. Verrier, 2008, Journal of experimental botany.

Nitrogen efficiency of wheat: Genotypic and environmental variation and prospects for improvement

Malcolm J. Hawkesford, P. Barraclough, R. López-Bellido, 2010 .