1. Text-book of Ophthalmology;CERVEIRA, A.;J. Mid. (Porto),1953
2. Ophthalmic Pathology. An Atlas and Text-book;GINDE, R.G.;J. All-India ophthal. Soc,1953
3. Hosoi, K. (1931). Arch. Surg., 22, 258.
4. Tumors of the Eye;REX3s, A.B.,1963
5. REX3s, A. B. (1963b). Idem, p. 202. SCHIFF-WERTHEIMnER, S., and LOISILLIER, P. (1954). Bull. Soc. Ophtal. Fr., p. 314.