L. Hanna, N. Girgis, A. el Ella, и Z. Farid. Metabolic, Pediatric, and Systemic Ophthalmology (New York, N.Y.: 1985), 11 (4):
160--162(1988)PMID: 3221799.
M. Breukels, E. van der Zijde, M. van Tol, и G. Rijkers. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 34 (2):
191--7(января 2002)PMID: 11740707.