1. FAO 2014 The role, impact and welfare of working (traction and transport) animals. Animal Production and Health Report [Internet] 2014 http://www.fao.org/3/a-i3381e.pdf
2. Rahman SA Reed K C 197-202 of the World Organisation for Animal Health Animal Welfare Working Group, 123, 7th B Main Road [Internet]. Vol. 33, Rev. sci. tech. Off. int. Epiz. Blackfriars Road 2014 https://doc.oie.int/seam/resource/directMedia/KqDo3sTEkTDrijU8uYi9a6c5dlyfP1P4;jsessionid=9d5e95f99c4835028f5623494481?binaryFileId=11687&cid=1532
3. Burn CC Dennison TL Whay HR Environmental and demographic risk factors for poor welfare in working horses, donkeys and mules in developing countries 2010 https://ac-els-cdn-com.ezproxy.is.ed.ac.uk/S1090023309003815/1-s2.0-S1090023309003815-main.pdf?_tid=a5a1bf65-1e52-4fcd-be46-09d1ba9f754b&acdnat=1546866870_e0cf809764119985c0268f9062d96c25
4. Assessment of the welfare of working horses, mules and donkeys, using health and behaviour parameters;Pritchard;Prev Vet Med,2005
5. Pack wounds of donkeys and mules in the Northern High Atlas and lowlands of Morocco;Sells;Equine Vet J,2010