1. 1. Pearson RA, Nengomasha E, kreck RC (1999) The challenges of using donkeys for work in Africa, London 190-198. Link: https://goo.gl/nXF4rw S
2. 2. Bowman's DD (2003) Parasitology for veterinarians. 8th ed. New York: Saunders 155-184. Link: https://goo.gl/FCrjjh
3. 3. Fielding D (1991) The number and distribution of equines in the world, UK 62-66. Link: https://goo.gl/krf6Dr
4. 4. Taylor MA, Coop RL, Waller RL (2007) Veterinary parasitology. 3rd ed. United Kingdom: Black well publishing. 272-286. Link: https://goo.gl/HJ9sdw
5. 5. Elisabeth D, Sevendesen MBE (1997) Professional donkey hand book, London: anleyroad. 61-67.