1. LEWIS, THOMAS, Dtsch. von Otto Wuth. Kabitzsch 1924.
2. RUSSEL-WELLS, SYDNEY and HARALD W. WILTSHIRE, Lancet202, Nr. 20, 1922.
3. GAGER, LESLIE F., and HAROLD E. B. PARDEE, Americ. journ. of the med. sciences169, Nr. 5. 1925.
4. BICKEL, GEORGES, Schweiz. med. Wochenschr. 1925, Nr. 13.
5. GAGER, LESLIE F., Arch. f. intern. Med.33, Nr. 4. 1924.