1. Anonymous, 1995a. Heterotrophic plate count. In: Am. Public Health Org./Am. Water Works Ass./Water Env. Fed. (Ed.), Standard Methods for the examination of water and wastewater. Chap. 9215. Washington, 9-32-9-39.
2. Anonymous, 1995b. Assimilable organic carbon (proposed). In: Am. Public Health Org./Am. Water Works Ass./Water Env. Fed. (Ed.), Standard Methods for the examination of water and wastewater. Chap. 9217. Washington, 9-39-9-43.
3. Richtlinie 98/83/EG des Rates vom 3. November 1998 über die Qualität von Wasser für den menschlichen Gebrauch;Anonymous,1998
4. Verordnung zur Novellierung der Trinkwasserverordnung vom 21. Mai 2001;Anonymous;Bundesgesetzblatt Teil 1,2001
5. Procedures for detecting outlying observations in samples;Grubbs;Technometrics,1969