Lane, J. Geoffrey (23 January 2013). "Disorders of the ear, nose and throat". In Mair, Tim; Love, Sandy; Schumacher, James; Smith, Roger K.W.; Frazer, Grant (eds.). Equine medicine, surgery and reproduction (2nd ed.). Elsevier. p. 89. ISBN9780702052026.
Dwyer, Ann E. (2016). "Practical field ophthalmology". In Gilger, Brian C. (ed.). Equine Ophthalmology (3rd ed.). John Wiley & Sons. p. 175. ISBN9781119047858.
merckvetmanual.com
Rush, Bonnie R. (2019). "Sinus cysts". The Merck Veterinary Manual. Retrieved 2019-10-26.