1. The USDA-DHIA Modified Contemporary Comparison sire summary and cow index procedures;Dickinson;ARS-USDA Prod. Res. Rep,1976
2. Sire evaluation and genetic trends;Henderson,1973
3. Use of relationships among sires to increase accuracy of sire selection;Henderson;J. Dairy Sci.,1975
4. Inverse of a matrix of relationships due to sires and maternal grandsires;Henderson;J. Dairy Sci.,1975
5. Hinks, J. 1973. A comparison of Canadian and U.S. Holstein-Friesian bulls reciprocally tested in Canada and the U.S. Presented paper, Eur. Assoc. Anim. Prod. Mtg.