1. Fixation de l'azote atmosph 6rique par l'interm 6diaire d'enzymes extraites de cultures d'Azotobacter. Compt. rend;BACH A. N.;Acad. Sci. U.S.S.R.,1934
2. BUCHANAN R. E. AND FULMER E. I. 1928 Physiology and Biochemistry of Bacteria. Baltimore Vol. I.
3. Azotase and Nitrogenase in Azotobacter. Ergebnisse der Enzymeforschung (Nord and Weidenhagen);BURK D.;Leipzig,1934
4. The production of ammonia by Azotobacter and its relation to the mechanism of nitrogen fixation;BURK D.;Trans. A. Third Intern. Cong. Soil Sci.,1935
5. The specific catalytic r61e of molybdenum and vanadium in nitrogen fixation and amide utilization by azotobacter;BURK D.;Ibid.,1935