German standard methods for the examination of water, waste water and sludge - Bio-assays with microorganisms (group T) Determination of organophosphate and carbamate pesticides by the cholinesterase inhibition test (T 1)
German standard methods for the examination of water, waste water and sludge - Bio-assays (group L) - Part 3: Toxicity test for assessing the inhibition of the dehydrogenase activity of activated sludge microorganisms (TTC-Test) (L 3)
Conformity assessment - Requirements for bodies providing audit and certification of management systems - Part 11: Competence requirements for auditing and certification of facility management (FM) management systems