1. Lauryl sulphate tryptose broth as a presumptive and confirmatory medium for coliform organisms;Bicknell;J. Am. Wat. Wks Ass.,1954
2. Manual for the Identification of Bacteria;Cowan,1965
3. Identification of the Enterobacteriaceae;Edwards,1962
4. Die Gärunsprobe bei 46°C als Hilfsmittel bei der Trinkwasseruntersuchung;Eukman;Zbl. Bakt.,1904
5. A single tube confirmatory test for E. coli at 44°C;Fennel,1972