1. Symposium on the treatment of non-paralytic squint;Peter;Trans. Ophth. Soc. U. Kingdom,1932
2. Treatment of strabismus; influence of orthoptic training on results of operation;Bressler;Arch. of Ophth.,1936
3. Orthoptic training;Pugh,1936
4. Orthoptic training and surgery in hyperphoria and hypertropia combined with lateral deviations;Berens;Amer. Jour. Ophth.,1935
5. The diagnosis and treatment of non-paralytic strabismus;Berens;New York State Jour. Med.,1929