1. Lawrence. 1843. Diseases of the eye.
2. Wilde. 1848. Dublin Quarterly Jour., Nov.
3. Unsymmetrical ocular peculiarities in patients with irises of different colors;Hutchinson;Ophth. Hosp. Reports,1869
4. Hutchinson. Congenital difference in color of iris. Soft cataract in one while the other remained free. Ophth. Hosp. Reports, v. 6, p. 277.
5. Ueber vasomotorische Störungen des Auges;Samuelsohn;Graefe's Arch.,1875