Corfield AP, Donapaty SR, Carrington SD, Hicks SJ, Schauer R, Kohla G. Identification of 9-O-acetyl-N-acetylneuraminic acid in normal canine pre-ocular tear film secreted mucins and its depletion in Keratoconjunctivitis sicca. Glycoconj J. 2005 Nov;22(7-9):409–16. doi: 10.1007/s10719-005-3698-3. PMID: 16311885.
Identification of 9-O-acetyl-N-acetylneuraminic acid in normal canine pre-ocular tear film secreted mucins and its depletion in Keratoconjunctivitis sicca