1. The relative efficiencies of selection indexes;Cunningham;Acta Agric. Scand.,1969
2. SELIND–Computer Programme Specification;Cunningham,1970
3. The genetic basis for constructing selection indexes;Hazel;Genetics,1943
4. Holstein International. 2006. Indexes around the world: Conformation and fertility receiving more and more emphasis. October 2006.
5. Comparison of international selection indexes for dairy cattle breeding;Leitch;Interbull Bull.,1994