Wallace, John Hankins, ed. (1883). "Mule Breeding in Poitou". Wallace's Monthly, Volume 9. Benjamin Singerly. pp. 128–130.
doi.org
Trimeche, A.; Renard, P.; Tainturier, D. (1998). "A Procedure for Poitou Jackass Sperm Cryopreservation". Theriogenology. 50 (1): 793–806. doi:10.1016/S0093-691X(98)00184-8. PMID10734453.
Legrand, R., Tiret, L. & Abitbol, M. Two recessive mutations in FGF5 are associated with the long-hair phenotype in donkeys. Genet Sel Evol 46, 65 (2014). https://doi.org/10.1186/s12711-014-0065-5