1. Citric acid fermentation;Rmscor OT, S. C.;Ind. Eng. Chem. Ind. Ed.,1934
2. Heavy metal nutrition.of fungi;FosTm J. W.;Botan. Rev.,1939
3. Effect of metalhic ions on the production of citric acid by Aspergilius niger;Lm N, D., DORIWLL, W. W., AND JOHNSON, M. J.;Arch. Biochem.,1946
4. Production of citA"c acid from cane molase;Ki TA, D. A.;Arch. Biochem.,1948
5. Determination of citric acid in fermentation media and biological materials;Pz RLMAN, D., TLAY, H. A., AND JOHNSON, M. J.;Ind. Eng. Chem. Anal. Ed.,1944