1. Thoft RA and Friend J : Biochemical transformation of regenerating ocular surface epithelium. Invest Ophthalmol Vis Sci 1977, 16: 14–20.
2. Friendenwald JS : Growth pressure and metaplasia of conjunctival and corneal epithelium. Doc Ophthalmol 1951, 5: 184–7.
3. Shapiro MS, Friend J, Thoft RA : Corneal re-epithelialization from the conjunctiva. Invest Ophthalmol Vis Sci 1981, 21: 135–42.
4. Kinoshita S, Friend J, Thoft RA : Biphasic cell proliferation in transdifferentiation of conjunctival to corneal epithelium in rabbits. Invest Ophthalmol Vis Sci 1983, 24: 1008–14.
5. Ebato B, Friend J, Thoft RA : Comparison of central and peripheral human corneal epithelium in tissue culture. Invest Ophthalmol Vis Sci 1987, 28: 1450–6.