1. G. Hecht, in: Ophthalmic Preparations, Chapter 89, pp. 1563–1573.
2. I. Reddy, Ocular Therapeutics and Drug Delivery, p. 379.
3. C. Wilson, N. Washington, Physiological Pharmaceutics, p. 261.
4. M. Gibson, Pharmaceutical Preformulation and Formulation-A Practical Guide from Candidate Drug Selection, p. 486.
5. A.H. Kibbe, Handbook of Pharmaceutical Excipients 3rd ed., p. 33.