Nwachukwu, E., Ikeorgu, J., & Asiedu, R. (2008). Multi-environment trial of newly developed white yam genotypes I: Analysis using genotype main effect and genotype – by environment interaction (GGE Biplot) model. Nigerian Journal of Genetics, 20(1), 49–53. https://doi.org/10.4314/njg.v20i1.42252