1. The lacrimal apparatus;Lemp,1992
2. Clinical anatomy of the equine head;Kainer;Vet Clin North Am Equine Pract,1993
3. The horse;Prince,1960
4. The head and ventral neck of the horse;Dyce,1996
5. Equine eyelid disease;Plummer;Clin Techn Equine Pract,2005