1. Balasch, S, Nuez, F, Palomares, G, and Cuartero, J. 1984. Multivariate analysis applied to tomato hybrid production. Theor Appl Genet, 69, 39–45.
2. Charmet, G, Balfourier, F, and Bion, A. 1988. Genetic variation among French wild populations of perennial ryegrass. In: Proceedings of the Eucarpia Fodder Crops Section Meeting, INRA, Lusignan, France, 1987, 37–44.
3. Falcinelli, M, Veronesi, F, and Lorenzetti, S. 1988. Evaluation of an Italian germplasm collection of Lolium perenne L. through a multivariate approach. In: Proceedings of the Eucarpia Fodder Crops Section Meeting, Lusignan, France, 1987, 23–35.
4. Godshalk, E B, and Timothy, D H. 1988. Factor and principal component analyses as alternatives to index selection. Theor Appl Genet, 76, 325–360.
5. Hazel, L N. 1943. The genetic basis for constructing selection indexes. Genetics, 28, 476–490.