1. The mercurials used for syphilis in the 1500's might also be considered as the first antibacterials.
2. Sulfanilamido-s-triazines. I. Synthesis of 2-Sulfanilamido-4,6-diethyl-s-triazine and Related Compounds
3. A. R. Frisk and E. Hultman, 4th Internat. Congr. Chemotherapy, 1965, Washington, D. C., Abstracts, p. 33.
4. 962. Congeners of pyridine-4-carboxyhydrazide. Part II. Derivatives of 1,2,3-thiadiazole