1. Third Ordinance Amending Narcotics Legislation;BtMAEndV,1991
2. Berliner Wasserbetriebe;BWB,2012
3. Berliner Wasserbetriebe;BWB,2012
4. Limits, Guide Values, Orientation Values, Intervention Values – Definitions and Maximum Values;Dieter,2011
5. German Standard Methods for Water, Wastewater and Sludge; General Information (Group a); Sampling from Aquifers (A 13);DIN 38402-13,1985