Haussmann, B I G and Hess, D E and Reddy, B V S and Mukuru, S Z and Kayentao, M and Welz, H G and Geiger, H H  (2001) Pattern analysis of genotype × environment interaction for striga resistance and grain yield in African sorghum trials.  Euphytica, 122 (2).  pp. 297-308.  ISSN 0014-2336