1. BARTON-WRIGHT E. C. 1952 The microbiological assay of the vitamin B-complex and amino acids. Pitman Publishing Corporation New York New York.
2. A note on the amino acids yielded by yeast, sunflower seed meal, and sesame seed after hydrolysis of the fat-free tissue;BLOCK R. J.;Arch. Biochem.,1945
3. The amino acids yielded by various yeasts after hydrolysis of the fat-free material. A comparative investigation;BLOCK R. J.;Arch. Biochem.,1945
4. BLOCK R. J. AND BOLLING D. 1951 The amino acid composition of proteins and foods analytical methods and results 2nd ed. Charles C Thomas Springfield Illinois.
5. BLOCK R. J. AND WEISS K. W. 1956 Amino acid handbook: methods and results of protein analysis pp. 322-327. Charles C Thomas Springfield Illinois.