Michels KB, Rothman KJ. Update on unethical use of placebos in randomised trials. Bioethics. 2003 Apr;17(2):188-204.
Mansfield CA, Van Houtven G, Huber J. The efficiency of political mechanisms for siting nuisance facilities: are opponents more likely to participate than supporters? J Real Estate Financ Econ. 2001;22(2/3):141-62.