1. AWIR 2015. Ankole Watusi International Registry. Kansas USA. Online http://www.awir.org/.
2. Apori SO Hagan JK 2014. The effect of non-genetic factors on the reproductive performance of sanga and Friesian × Sanga crossbred dairy cattle breeds kept under hot and humid environment. Tropical Animal Health and Production 46(6):1045-1050. http://rd.springer.com/journal/11250
3. Berman A 2011. Are adaptations present to support dairy cattle productivity in warm climates? Journal of Dairy Science 94(5):2147-2158. http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B9887-52P7J64-S&_user=3325428&_coverDate=05%2F31%2F2011&_rdoc=3&_fmt=high&_orig=browse&_origin=browse&_zone=rslt_list_item&_srch=doc-info(%23toc%2359175%232011%23999059994%233128777%23FLA%23display%23Volume)&_cdi=59175&_sort=d&_docanchor=&_ct=59&_acct=C000050221&_version=1&_urlVersion=0&_userid=3325428&md5=5b5f3a9a2030dd26fc894d0d3e82256f&searchtype=a
4. Bessa I Pinheiro I Matola M Dzama K Rocha A Alexandrino P 2009. Genetic diversity and relationships among indigenous Mozambican cattle breeds. South African Journal of Animal Science 39(1):61-72.
5. Collier RJ Bilby TR Rhoads ME Baumgard LH Rhoads RP 2008. Effects of climate change on dairy cattle production. Annals of Arid Zone 47(3/4):393-411.