1. Why commercial producers are crossbreeding to jerseys;Anonymous;Jersey Journal Reprint,2000
2. Technical efficiency of European railways: a distance function approach;Applied Economics,2000
3. Holstein lineages trace back to two bulls;Dechow,2015
4. Fohrman, M.H., McDowell, R.E., Matthews, C.A. and Hilder, R.A. (1954), “A crossbreeding experiment with dairy cattle”, Technical Bulletin No. 1074, USDA, Washington, DC available at: http://books.google.com/books?id=5WkIfwxya14C&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false (accessed August 2015).