@misc{herzsprung_determination_of_1991, 
author={Herzsprung, P., Weil, L., Niessner, R.},
title={Determination of organophosphorus compounds and carbamates by their inhibition of cholinesterase: Part 3 The cholinesterase inhibition test and its experimental realisation for detecting insecticides in water},
year={1991},
howpublished = {book part},
note = {Herzsprung, P.; Weil, L.; Niessner, R.: Determination of organophosphorus compounds and carbamates by their inhibition of cholinesterase: Part 3 The cholinesterase inhibition test and its experimental realisation for detecting insecticides in water. In: Hochmueller, K. (Ed.): Vom Wasser. Weinheim: VCH. 1991. 51-60.}}