Bailey, R. A., Kunert, J. and Martin, R. J. 1990. Some comments on Gerechte designs. I. Analysis for uncorrelated errors. Journal of Agronomy and Crop Science. 165, pp. 121-130..
Barraclough, P. B., Kuhlmann, H. and Weir, A. H. 1990. The effects of prolonged drought and nitrogen fertiliser on root and shoot growth and water uptake by winter wheat. Journal of Agronomy and Crop Science. 163 (5), pp. 352-360. https://doi.org/10.1111/j.1439-037X.1989.tb00778.x