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 Tech Equine Pract,2005