1. Cushny: The secretion of urine. London 1917.
2. P. Brandt-Rehberg: Zbl. inn. Med.15, 367 (1929).—Biochemis. J.19, 270, 278 (1925);20, I, 447 (1926).
3. Descombes: Biochem. Z.246, 59 (1932).
4. Höber: Pflügers Arch.224, 62 (1930).
5. Steffanutti, P.: Pflügers Arch.226, H. 1, 148 (1930); Policlinico, sez. med.1932.