1. Ueber Messung des Schielgrades and Dosirung der Schieloperation;Hirschberg;Centralbl prakt Augenh,1885
2. Ueber Schielmessung;Du Bois-Reymond;Centralbl prakt Augenh,1886
3. Atlas of Strabismus;Von Noorden,1983
4. Burian-Von Noorden's Binocular Vision and Ocular Motility: Theory and Management of Strabismus;Von Noorden,1985
5. Alignment;Parks,1987