Smith BP. 2015. Large Animal Internal Medicine. Fifth Edition. Elsevier.
Aiello SE. 2016. The Merck Veterinary Manual. Eleventh Edition. Merc & Co Inc.
Constable PD, Hinchcliff KH, Done SH, Grunberg W. 2017. Veterinary Medicine, A Textbook of the Diseases of Cattle, Horses, Sheep, Pigs, and Goats. Eleventh Edition. Elsevier.
Anderson DE, Rings DM. Current Veterinary Therapy: Food Animal Practice. Fifth Edition. Elsevier Saunders.
Noakes DE, Parkinson TJ, England CW Gary. 2019. Veterinary Reproduction and Obstetrics. Tenth Edition. Elsevier.
Corc SC, Halliwell RW. 2019. The Veterinary Laborathory and Field Manual. Third Edition. 5M Publishing Ltd.
World Organisation for Animal Health (WOAH). 2022. Manual of Diagnostic Tests and Vaccines for Terrestrial Animals 2022; Terrestrial Manual Online Access;
World Health Organisation (WHO). https://www.who.int/.