References
- Lehmann J. A Micromethod for the Determination of Para-aminosalicylic Acid (PAS) in Blood, Urine and other Biological Fluids. Scandinav. J. Clin. & Lab. Investigation 1951; 3: 306
- Morris C. J. O. Determination of Sulfanilamide and its Derivative. Biochem. J 1941; 35: 952
- Werner A. E. A. Estimation of Sulfanilamide in Biological Fluids. Lancet 1939; 236: 18