1. Biochemistry;Cantarow,1954
2. Quoted in Baldwin's Dynamic Aspects of Biochemistry;Sumner,1948
3. Comparative Concentration of Urea in the Blood and Saliva in a Series of Pathological Cases;Schmitz;J. Lab. & Clin. Med.,1922
4. Amino Acids and their Deaminating Systems present in Human Saliva;Kesel;Am. J. Orthodont. & Oral Surg.,1947
5. Significance of Urea Clearance;Van Slyke;J. Clin. Path.,1949