1. Beckman Instruments Inc., Product Development Bulletin 6964, Carlsbad, CA 92008, U.S.A.
2. Water quality monitoring: bacteria as indicators;Bowdre,1974
3. The assessment of the possible inhibitory effect of dye-stuffs on aerobic wastewater bacteria;Brown,1981
4. Die Beurteilung von Abwasser und Schlamm mittels TTC;Buchsteig;Gass Wasser,1959