1. American Public Health Association 1955a Standard methods for the examination of water sewage and industrial wastes 10th ed. 375-387.
2. American Public Health Association 1955b Standard methods for the examination of water sewage and industrial wastes 10th ed. 390-393.
3. The coliform group. I. The boric acid lactose broth reaction of coliform IMViC types;CLARK H. F.;Appl. Microbiol.,1957
4. Die garungsprobe bei 460 als hilfsmittel bei der trinkwasseruntersuchung;EIJKMAN C.;Centr. Bakteriol. Parasitenk., Abt. I, orig.,1904
5. Optimum temperaturle for differentiation of Escherichia coli from other coliform bacteria;HAJNA A. A.;J. Bacteriol.,1939