1. Boldman, K.G., Kriese, L.A., van Vleck, L.D., Kachman, S.D., 1995. A Manual for Use of MTDFREML—A Set of Programs to Obtain Estimates of Variances and Covariances. US Department of Agriculture, Agricultural Research Service, University of Nebraska, Lincoln.
2. Falconer, D.S., 1983. Introduction to Quantitative Genetics, 2nd ed. Essex, England.
3. Genetics of traits which determine the suitability of dogs as guide-dogs for the blind;Goddard;Appl. Anim. Ethol.,1982
4. Henderson, C.R., 1973. Sire evaluation and genetic trend. In: Proceedings of the Anim. Breed. Genet. in honour of J.L. Lush. ASAS and ADSA, Champaign, IL, pp. 10–41.
5. Estimation of variance components of threshold characters by marginal posterior modes and means via Gibbs sampling;Hoeschelle;Genet. Sel. Evol.,1995