1. ANDERSON, E. C. (1956). Brit. orthopt. J., 13, 82.
2. "Amblyopiebehandlung," Bibl;BANGERTER, A.,1953
3. Karger, Basel. BROCK, F. W., and GIVNER, I. (1952). A.M.A. Arch. Ophthal., 47, 775.
4. BUFFON, L. G. DE (1746). Hist. et Mem. Acad. Sci. (Paris), Annee 1743, Mem., p. 231.
5. BURIAN, H. M. (1947). Amer. J. Ophthal., 30, 1005.