1. The heritability of milk yield at different levels of production and the effect of production differences on dairy sire appraisals;Burnside;J. Dairy Sci.,1961
2. Estimating son's progeny test from his pedigree information;Butcher;J. Dairy Sci.,1976
3. Heterogeneity of daughter variances of sires for milk yield;Clay;J. Dairy Sci.,1979
4. Interaction between genotype and environment in sire evaluation for milk production;Danell;A eta Agric. Scand.,1982
5. Dickinson, F. N., H. D. Norman, R. L. Powell, L. G. Waite, and B. T. McDaniel. 1976. Procedures used to calculate the USDA-DHIA modified contemporary comparison. Page 18 in USDA Prod. Res. Rep. 165.